Malicious PDF — malware analysis report

Static analysis result for SHA-256 67389af010a4b70d…

MALICIOUS

PDF

45.2 KB Created: 2020-08-16 16:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1317174a7959ee96d380d76f851e4d3c SHA-1: 69cccf85848e15dc108037b52bd23a4d1e1a4431 SHA-256: 67389af010a4b70d9e8075b5a0b4bff7c0f49f3d336b83007383d4a43d319ae9
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as part of a malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'pathogenesis of pneumonia pdf' and includes the primary malicious URL. This suggests the file is part of a link farm or SEO scam designed to drive traffic to malicious sites.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=pathogenesis+of+pneumonia+pdf
    • http://gedijixo.threefaiths.org/uploads/1/3/0/7/130776760/suvasidug_puwexikuropibe_tolokenu.pdf
    • http://files.tampaiscebs.org/uploads/1/3/0/9/130969474/varinir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/66626501473.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/64331136354.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/algorithms_and_complexity_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/71358755639.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2454/files/lafapekes.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0554/files/23432911505.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/25169046387.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5099/files/the_elements_of_statistical_learning_friedman.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/link_to_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0431/2173/7882/files/nouns_adjectives_verbs_and_adverbs_transformation_tables.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/italian_alphabet_chart.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f30.bin
e58f84460a8f52eafcc10c01fd5b6ea5dad29c5518594c1651dc0230dd83831e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F30 5328 bytes
font_01_sfnt_off0000712f.bin
32ee7d1c8880abb84a0798f2e776bd996bc61b75bbe18fd01f6251a72253df01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712F 9780 bytes
font_02_sfnt_off000092c2.bin
15cc5c52b507135e8b88421ba6518d619f75b60a2b0061e0982ff1989570a3ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C2 16120 bytes

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