Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59264cfd78e74a7…

MALICIOUS

PDF

39.7 KB Created: 2020-08-20 15:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1054276d9a0775d6188fe366a4489b7b SHA-1: 2bacec0442334291aa7d1175e9b862bcaedbf5ab SHA-256: f59264cfd78e74a76b9b432817dd557594d7ac830cceac8fdfeac6a59c984f2d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=the+election+of+1860+worksheet', is flagged as a malicious redirector. The document body also contains numerous links to Shopify domains, likely part of a link farm to obscure the malicious redirector. The ML classifier strongly indicates maliciousness.

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=the+election+of+1860+worksheet
    • http://molovor.embodimentcollective.co.nz/uploads/1/3/0/7/130775164/kepelisufafokewimo.pdf
    • http://files.lavernemleonard.com/uploads/1/3/1/4/131438611/xasoxolan_mojilekibu_mifukopinetak_kuvoji.pdf
    • http://files.theworldof131.com/uploads/1/3/0/8/130814208/dakekad.pdf
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/30889501974.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/xomozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4623/1449/files/case_study_research_format.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/83666356833.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/2016201311.pdf
    • https://cdn.shopify.com/s/files/1/0431/7796/7778/files/kirofufitanofoweke.pdf
    • https://cdn.shopify.com/s/files/1/0438/5737/9488/files/3815093409.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5203/files/gowamosusufawiragit.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c55.bin
3bff354233027afcfef84febcd6383c70595c40d3af5b0e8d4e9930af7bbb4dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C55 5408 bytes
font_01_sfnt_off00006ecb.bin
1784fd224fe045fd76aa17304c8b68f25cc3fbaa80720efe541fce0175756d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECB 10428 bytes

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