Malicious PDF — malware analysis report

Static analysis result for SHA-256 91cf98dd82d78e79…

MALICIOUS

PDF

42.9 KB Created: 2020-09-13 14:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 41d21677e8d818e2569ee6eea428f89c SHA-1: dacdb7b2d2dea89000501ba5942bdaba8de93c52 SHA-256: 91cf98dd82d78e79d1f9d4f00207e2e48e124b96e2813a927c42e4aba30968ad
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is likely used to distribute further malicious content or phish for credentials. The document also contains a large number of links to PDF files hosted on Shopify, suggesting a link farm or SEO manipulation tactic to improve the ranking of the malicious redirector. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.club/wix?keyword=hp+pavilion+595-p0084+computer In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/54720280662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/zamigeneguxolurawar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/mifazopejagixoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/hand_hygiene_audit_template.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/21b4a7_0c60c5da2cdf4b5d98ee3b36066693b4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7198c1_0d70584c65054f2dbf67ba0b8c8b8113.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/15cd4d_4fdbbd0c16ab447082472a2f7a4e201b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dad90e_b67973d4f66349909191767f7bea45d1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7a13df_02ceaed6ed5f49ee92550b28032844d0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/43840876022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/29539376328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7582/9911/files/konsep_askep_bblr.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a107db_310e96234a374be78dad3863f390bbea.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/83e584_b1c43e6aa0f14298abf2b0d118796155.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2813e2_b43c1f3089384a2eb1461f588faa2e0d.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_off000068ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CA 5656 bytes
SHA-256: ba83b22d979bf7f8c18d7e720a5ab1bd5cc94862a54cd12769c31d81d9fc41b4
font_01_sfnt_off00007c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0E 10096 bytes
SHA-256: daaca0454ad44931221e4c38f0cef4186dcda82ec491eadea536eb0c687e1623

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