Malicious PDF — malware analysis report

Static analysis result for SHA-256 0feb8a45d4f154fe…

MALICIOUS

PDF

46.7 KB Created: 2020-08-07 22:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6ff7c890fede1ab772acb156a34d918 SHA-1: d0cca8a0d88faad48ea73d619db7356ef29c4207 SHA-256: 0feb8a45d4f154fec5fb9730011d6ff016fa10e48d4277840305151a4e3a43ee
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 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous PDF links, many pointing to Shopify, indicates a link farm designed to distribute further malicious content or SEO spam. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/pify?keyword=arihant+upsc+books+pdf+free+download
    • http://files.minyiofficial.com/uploads/1/3/2/3/132303012/84d57d9e.pdf
    • http://files.fcchartselle.com/uploads/1/3/1/4/131406092/fosezatu.pdf
    • http://files.quantum5280.com/uploads/1/3/2/6/132681938/voleso-dabig-zonafumobeful.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4461/6864/files/44170915799.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6924/files/twitch_keyboard_shortcuts.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/36241821340.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/xuwamirixunosedukelepomi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/33517818643.pdf
    • https://cdn.shopify.com/s/files/1/0450/5042/9598/files/openssl_verify_self_signed_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0440/3996/2774/files/kusakanolotisudonelo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1924/files/81800880335.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9818/files/certainty_equivalent_and_risk_premium_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/9158/3391/files/osrs_desert_diary.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/52395611262.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/xorabanojedaniniv.pdf
    • https://cdn.shopify.com/s/files/1/0435/5286/6463/files/add_bookmarks_online.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_off00006c53.bin
addaf5344a06bd324177002b7af355c7e9627be4d46b3147f91d52c9d148c5b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C53 5528 bytes
font_01_sfnt_off00007f25.bin
129845f802aa7b23d969f362521b3d0f5f001d90a8f9311ba1b7fd49f2eb9122		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F25 15032 bytes

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