Malicious PDF — malware analysis report

Static analysis result for SHA-256 140f443701417032…

MALICIOUS

PDF

37.4 KB Created: 2020-08-20 11:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 959acfacd98e43b42a18d6fd8321382f SHA-1: 5729e3e6a3ec90ffde3afb485873bb7df23d17e6 SHA-256: 140f44370141703263af0fd3ae3dd0ef027816447d9f4392e82ede619d8d8b57
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=aircraft+structural+technician+book+pdf`. The document body also contains this URL and numerous other links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=aircraft+structural+technician+book+pdf
    • http://files.titansinvite.com/uploads/1/3/1/6/131607522/lomina_vutunifurep_rudorifopagu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/64179757689.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/62165353861.pdf
    • https://cdn.shopify.com/s/files/1/0435/0204/3288/files/pawilevotarerivexiboraf.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/bhagwan_ke_bhajan_kare.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/61880486507.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/16950865599.pdf
    • https://cdn.shopify.com/s/files/1/0434/1789/5068/files/marathi_inspirational_quotes_on_life_challenges.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/47236433206.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/appcoda_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/64617287911.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/84562855112.pdf
    • https://cdn.shopify.com/s/files/1/0430/5856/1175/files/47533320793.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_off00004686.bin
6897859d1f6804068391af69ecfb7391cbbee33be5931c089f54c2c0fca73856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4686 5320 bytes
font_01_sfnt_off00005874.bin
b55146e9a72194c15736b7cf9b046892ae21c9304ae0e06bc31f1983990cd1d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5874 9988 bytes
font_02_sfnt_off00007ab6.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB6 4324 bytes

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