Malicious PDF — malware analysis report

Static analysis result for SHA-256 3170c645c7c3c9be…

MALICIOUS

PDF

34.0 KB Created: 2020-10-27 21:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4310866ca1a476b75504cc5d25dacba2 SHA-1: 3cd3ab64fcde09c80708f50d9b170d423e0ef1e1 SHA-256: 3170c645c7c3c9be3282499e0009d84861c83a760c2a8c7a617621d8a72d45a2
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests the PDF is designed to trick users into visiting a malicious site, likely for phishing or malware distribution.

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://ttraff.com/123?keyword=bob+evans+calorie+counter In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408987/normal_5f93db3c2a113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f895b3a811c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5f9854c80efb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f875af22850a.pdfIn PDF document text
    • https://rovumixonisi.weebly.com/uploads/1/3/4/0/134012407/watole_fezizexo.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/f1400cda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e273c6bc-1fb4-4750-84cf-a034b11cfc83/titobesovitogidogopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa96623-695d-4ef2-9223-204fbc6b94dd/zabavuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50260b57-4e7e-4bae-8abe-6f7ba2581734/dilizobuzogidoxape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54d17e1e-3b8c-4a37-bd03-2277e712f894/rinemarupogigasevir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a9db38-5cfe-411c-8447-306b27f24e13/jepam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9474/6288/files/honda_fourtrax_250_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/88810103228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6093/1991/files/anandamela_pujabarshiki_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5978/1023/files/gestalt_o_que.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/steve_mcadams_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/stomach_cancer_symptoms_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/werivosubino.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/barefoot_investor_audiobook_itunes.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/carb_free_food_list.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/68904751320.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/11096666374.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/ey_robotic_process_automation.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49E6 5040 bytes
SHA-256: 56d10ce695f421118a0a0cb0687c572c1c4f7dbe6f7f251281272e4baf078dd1
font_01_sfnt_off00005b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1E 9448 bytes
SHA-256: 748947039547a83e6cd13265aa488b58f08bf4d7c83e83b030eee252d8c4b99d