Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c86758b309325c8…

MALICIOUS

PDF

49.0 KB Created: 2020-08-06 21:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c294f555a8e0f691304bcf6441a50277 SHA-1: a5c6c79929cead735f3dfe04a4901f178a5365c3 SHA-256: 5c86758b309325c8368a58ba907f025ff36f78efe84e3bd676a08103e236f7cd
174 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=gan+cfop+tutorial+pdf`. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on Shopify, suggesting a link farm or redirection scheme. The presence of a callback phishing lure heuristic further supports the malicious intent, likely to direct users to malicious sites or initiate further compromise.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.ru/pify?keyword=gan+cfop+tutorial+pdf
    • http://files.thinkhairsalonstudio.com/uploads/1/3/1/3/131398231/994601.pdf
    • http://files.palmettomdpa.net/uploads/1/3/1/3/131380733/7501706.pdf
    • http://files.maineflyfishingguides.com/uploads/1/3/0/9/130969510/6158945.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/baburao_bagul.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/torejifetamibuxevezed.pdf
    • https://cdn.shopify.com/s/files/1/0432/1558/5448/files/93418990547.pdf
    • https://cdn.shopify.com/s/files/1/0437/1179/1253/files/noduxefa.pdf
    • https://cdn.shopify.com/s/files/1/0437/9957/6733/files/47659204349.pdf
    • https://cdn.shopify.com/s/files/1/0437/7296/9109/files/ford_factory_service_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/tubanipawek.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/77070235886.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5391/files/92306087089.pdf
    • https://cdn.shopify.com/s/files/1/0434/0678/6725/files/new_headway_beginner_student_book_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be2.bin
4161c9c377b6a633feca3dcc91a079ceb882a979f5d3c9da553480b9af3a295c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE2 4764 bytes
font_01_sfnt_off00007c1d.bin
9a910edd3ebbdb985e7dbb4811d9da9564439a41637c8749217bd0a590349b81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1D 14700 bytes
font_02_sfnt_off0000a969.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA969 4324 bytes

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