Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eee8247b8c281bd…

MALICIOUS

PDF

48.7 KB Created: 2020-08-25 09:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aacaa442181ca9cfa24218f415d532d SHA-1: c4c4ec4598340e470a9a8f8b5ec3cbd9d5ccdfbb SHA-256: 0eee8247b8c281bd95686a273f61f8310383de030e2785ad077ec1f0d8051b94
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the URL and keywords suggesting a lure. The presence of numerous external links, many pointing to benign Shopify domains, suggests a link farm used to obscure the malicious destination. No scripts were extracted, but the ML classifier strongly indicates malicious intent.

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=contract+of+employment+template+australia
    • http://files.statebirdtogo.com/uploads/1/3/2/7/132710687/a1b067.pdf
    • http://wukuzub.plantpartners.org/uploads/1/3/2/6/132681947/1b9a9fde2d425e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/wowosoluwosunaxevetab.pdf
    • https://cdn.shopify.com/s/files/1/0462/8919/1073/files/jakewozeritodaraxugo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8658/4733/files/papaniwivudeduvoben.pdf
    • https://cdn.shopify.com/s/files/1/0440/4045/4294/files/azure_iot_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/76001078180.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/wadotulubolubiwupekinekez.pdf
    • https://cdn.shopify.com/s/files/1/0440/4386/2181/files/tujexelojojuxine.pdf
    • https://cdn.shopify.com/s/files/1/0465/3200/1950/files/ncert_science_book_class_11_biology.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/pofuxisarajebir.pdf
    • https://cdn.shopify.com/s/files/1/0435/8828/8675/files/64744988892.pdf
    • https://cdn.shopify.com/s/files/1/0461/9855/4774/files/medical_insurance_policy.pdf
    • https://cdn.shopify.com/s/files/1/0434/3401/6924/files/kirezotek.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_off0000751f.bin
ec4a3bbc55209e6f48684b2f2480bbf29a6a66f731febc2ff00fe06354ec1f53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751F 5168 bytes
font_01_sfnt_off000086a4.bin
0e2d8e6a42c5e96bd7910ce31378fdc2420bfca50a1a3a203de3edf725b906b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A4 9636 bytes
font_02_sfnt_off0000a776.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA776 4324 bytes

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