Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c987f4b7129448…

MALICIOUS

PDF

45.5 KB Created: 2020-08-12 01:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63310c03dc10dece1a6cbf3c3fde8f53 SHA-1: 0ec09733d0ca1cd0354d18e3437738a34287b23d SHA-256: 13c987f4b71294488e7212958e66e3ddbf7a15e8b3a1e954864f855f3829f101
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which are designed to appear as legitimate documents but ultimately redirect to a malicious domain, ttraff.cc. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a known malicious redirector. The document body itself is heavily obfuscated but contains the primary malicious URL, suggesting an attempt to lure users to a compromised 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.cc/pify?keyword=alberta+vehicle+bill+of+sale+pdf
    • http://files.friendsofrothrock.org/uploads/1/3/1/4/131482931/kekawuka-jisoxitu-rakaxaxim-dozebon.pdf
    • http://kobalobew.sccliteracyproject.org/uploads/1/3/0/9/130969723/banisekuvezevo_lojodoj.pdf
    • http://files.backtoroyalty.net/uploads/1/3/0/7/130738859/4406150.pdf
    • http://files.markzauss.net/uploads/1/3/1/3/131380786/makaduwate-tipozixidil-kubifut-kopudisunega.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/66741825591.pdf
    • https://cdn.shopify.com/s/files/1/0439/3045/2123/files/20259872336.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/sivuja.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/jizojilewotitegavut.pdf
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/kavebidoveja.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/riwoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4262/6984/files/875834004.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/doxuwuvisodika.pdf
    • https://cdn.shopify.com/s/files/1/0436/8157/9161/files/48035105506.pdf
    • https://cdn.shopify.com/s/files/1/0430/4492/9690/files/19207768309.pdf
    • https://cdn.shopify.com/s/files/1/0440/8187/3048/files/adrenergic_and_cholinergic_receptors.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/69080776381.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_off000068ec.bin
3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68EC 2828 bytes
font_01_sfnt_off000072e7.bin
e601a4fe3fce27e3f53627ad58ef37f74c9d9e66b26bfe40074e87da7d92d16d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E7 5432 bytes
font_02_sfnt_off00008557.bin
c49190356efbae15ebae292f8d17927a0f81694d93aaab07dac7c5696b8e78aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8557 10196 bytes

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