Malicious PDF — malware analysis report

Static analysis result for SHA-256 502ff2682250004c…

MALICIOUS

PDF

42.8 KB Created: 2020-10-29 02:28:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bbed9964b4db73b9ae61fec27e234ab6 SHA-1: b51779c8f14c6cde1778c1a5a8e48fa10b639bfe SHA-256: 502ff2682250004cff9eb2a725091c06b9c24aac6808c9fcd1ac53d852645150
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one identified as a malicious redirector, which is designed to lead users to potentially harmful content. The document body and heuristics indicate an attempt to disguise this as a download lure, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ggtraff.ru/strik?keyword=how+to+download+clone+hero+songs+from+chorus In PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/9651870.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/sofikerilux_dawewirorolozu_zabosegisezaf.pdfIn PDF document text
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/2780827.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/ketosuronof.pdfIn PDF document text
    • https://bewarovawizijus.weebly.com/uploads/1/3/4/4/134454629/e55e006cf4beb.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/163c3886-dfb9-4ca7-9c98-589d1301ba80/tewiviluroni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54fef813-2457-41a1-9418-8cca3b79b65a/maglite_led_conversion_kit_aa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/aha_infective_endocarditis_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6036/2392/files/nosurozixabogisetuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d5b84a-02d3-4b0b-93b2-3e8aa5f8098a/mobalajozuviwet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/337ea922-c2c2-4ee5-93d2-df6934df2119/maselatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8885/3186/files/carly_bmw_von_ios_auf_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab78adb-8af3-4b1f-bc87-25a3d33b34a9/thule_400xt_fit_kit_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746793e8-98b3-48d2-94df-27c9da742769/rixavizuvajimire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/20658504205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fabdd666-31ae-47d4-9a5f-319f576b6d2e/89714442805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9301/5195/files/vujitazo.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_off00005861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5861 5320 bytes
SHA-256: 1673a4cb74cb54dcd2f8962488ab2236eaa14a84b35bed590467a932ab6efe00
font_01_sfnt_off00006a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5C 10968 bytes
SHA-256: fc7e2e5a080c3598191a978682a8da237e6b3e902c27bc3d2ac4325f3d1ed0ee
font_02_sfnt_off00008fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f