Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d716764973be400…

MALICIOUS

PDF

47.6 KB Created: 2020-10-26 23:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d3c7284d7a8faa6a8ccae8945e666a30 SHA-1: 31bf80ec280edb58c2fef5fd44da25e5f97d5f32 SHA-256: 4d716764973be4007a9c6e31d49abbd1631ae948444acaf291372541cc381909
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirection and SEO link farming, pointing to a phishing or malware distribution scheme. The embedded URL `https://gettraff.ru/123?keyword=lower+hudson+valley+volleyball` is flagged as a malicious redirector. Additionally, the document body contains numerous URLs, including a link to `https://uploads.strikinglycdn.com/files/2612e4cc-4158-493a-9521-fe3c4573cfb2/ravuvegesubupalizajonimiz.pdf`, which is part of a suspected link farm. The 'SE_CALLBACK_LURE' heuristic further suggests a callback phishing or tech-support scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/123?keyword=lower+hudson+valley+volleyball In PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/ee8336e1.pdfIn PDF document text
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/3479789.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bosilo_ginasesif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2612e4cc-4158-493a-9521-fe3c4573cfb2/ravuvegesubupalizajonimiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1bc040a-1f28-472a-9106-deca3574de27/vigusijoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6b1f4d-1fb8-4fa6-9fa2-c828c66dc433/kowumufagapepime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77caf02c-f474-423c-8a83-8df19d96406d/bose_soundlink_around-_ear_wireless_headphones_ii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22422510-6df4-4405-9e4d-39c7aaba7a5f/el_psicoanalisis_despues_de_freud.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/alstonia_boonei.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/kinolesim.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/vexifujuzenetaxabos.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/ramokituzatutibupumiwipi.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/36514193747.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/38794446611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3070/7865/files/gigixudefunijaguduzazef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6794/4341/files/46585536896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9245/8139/files/jewabumazojavelokikoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5640/6940/files/reformed_charismatic_churches_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/gacha_life_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1275/8426/files/3784083310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/vuvarul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5665/0144/files/47744909010.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCC 5000 bytes
SHA-256: 08e14d3005d171a59ff72284e70e578b727bd4aff192f1b333b13ddf8c784589
font_01_sfnt_off00007dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD8 10940 bytes
SHA-256: 2e0aa2b5b7d0fc7806fa8f3a7239d7ddab7a9f279b65d65bfcf8e9f91766cd5d
font_02_sfnt_off0000a30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA30B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378