Malicious PDF — malware analysis report

Static analysis result for SHA-256 6526e771d385f1a4…

MALICIOUS

PDF

86.7 KB Created: 2020-09-07 22:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdbb8d960430ecd14b9d6b69cb21076c SHA-1: 0b6b2d10446b54e8fc48c5a5a3a2120ce2656bd8 SHA-256: 6526e771d385f1a496de483d5595bc276bb3282c760ecc44fe62e22b3b33b322
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary purpose is to redirect users to malicious content, likely a phishing or malware distribution site.

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.com/wix?keyword=assembly+election+2019+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1125/1099/files/bulacan_state_university_form.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/toefl_writing_integrated_task_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/9785/0010/files/fegolip.pdf
    • https://cdn.shopify.com/s/files/1/0436/4029/1486/files/best_paid_screen_capture_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/3160/0031/files/kawasaki_owner_manual.pdf
    • https://static.usrfiles.com/ugd/d31907_8cbd60dd361b42b4a4a7d99d62452440.pdf
    • https://static.usrfiles.com/ugd/6f53d7_4ef1b8b80eec486e8b66041af61f2688.pdf
    • https://static.usrfiles.com/ugd/6df952_03a836dcc978414ea5b36ee644ad5395.pdf
    • https://static.usrfiles.com/ugd/c79b1c_673712f6777445e990780a0eff634f21.pdf
    • https://static.usrfiles.com/ugd/28146e_754d5e607c404684a9ce5c4d7e50e877.pdf
    • https://cdn.shopify.com/s/files/1/0462/5730/7797/files/rifujabixaxujatobok.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5694/files/83245584911.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/50133976336.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/gigusopodipomuserusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/51748156855.pdf
    • https://static.usrfiles.com/ugd/b8c837_d25c7ab58a8243cf896a62abec0d0184.pdf
    • https://static.usrfiles.com/ugd/87fdc7_c936884693e9425ebe0246cd8478c317.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aa8.bin
2a817dff0c36129455e39704ab1845885a8f676c125779c1b69cfdfa05478b5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 5708 bytes
font_01_sfnt_off00011e16.bin
7686b5b494dd62d1a69a138a30a8518a80a2bfe1211e76a25643553ac031246c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E16 15256 bytes

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