Malicious PDF — malware analysis report

Static analysis result for SHA-256 495d4f3568c75898…

MALICIOUS

PDF

53.6 KB Created: 2020-09-06 14:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0791975ebf469bda184f1703d1db7744 SHA-1: 7e9b8bda90e7005084231ffb178450820475e813 SHA-256: 495d4f3568c75898e4e3728dfd2c526a398c6c1df73245fc7b363fa103c080d0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=pet+bottle+blowing+process+pdf'. This URL is designed to lure users into clicking it, likely leading to a malicious site. The document also contains a large number of embedded links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted, but the presence of a malicious redirector and the document body's deceptive content strongly indicate a phishing or social engineering attack.

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.link/wix?keyword=pet+bottle+blowing+process+pdf
    • https://cdn.shopify.com/s/files/1/0434/0419/8038/files/firunawewoxobuzujukakuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/13600691486.pdf
    • https://cdn.shopify.com/s/files/1/0458/6438/6713/files/42972484515.pdf
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/78583640275.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/jnv_class_6th_admission_form.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc3e5999a7de4cafb3d8ed7e44dd68bf.pdf
    • https://static.usrfiles.com/ugd/111c46_ffd0a8cae41a4350a7019bfbc26dddde.pdf
    • https://static.usrfiles.com/ugd/c81504_b78677e667064ef79b0a4abbd4c816e2.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4687/files/bumudigumoderunefe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5481/5640/files/paxamizuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/introductory_statistics_8th_edition.pdf
    • https://static.usrfiles.com/ugd/a72fa8_b207d3e0c2a84a379d9436662bc5ed62.pdf
    • https://static.usrfiles.com/ugd/f34323_89658cdb4111494e88fd5c4a16db023f.pdf
    • https://static.usrfiles.com/ugd/5be868_4d7066b7209842b19d873f0f1c29ed12.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008774.bin
80960c5ef920dc812f40421d0c41ad5272b60f71c1256c1bdf7a11afd8d5b2df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8774 2880 bytes
font_01_sfnt_off000091b1.bin
02a8ce70ae6edc1b8a4d2b22fb4bebfc04d17fc0b2728519a8e0d4e901ed8ba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91B1 5348 bytes
font_02_sfnt_off0000a406.bin
a1ba19c8f0c17af84f6276dd9a6278c8a03b525a67c0aac80a61a177a2cc79b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA406 11052 bytes

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