Malicious PDF — malware analysis report

Static analysis result for SHA-256 0850a4a3a6f9bcaa…

MALICIOUS

PDF

54.2 KB Created: 2020-08-24 19:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e88ac5376b1e1dd369c57b15c0e41d92 SHA-1: a82f7b76902aa49ec6f2d3d14bf424f72ea2e384 SHA-256: 0850a4a3a6f9bcaad557d541daf3cd4c247a85a2abee6589ec3c1d9385512556
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link that points to 'https://ttraff.com/pify?keyword=interrogative+adjectives+worksheet'. This URL is flagged as malicious and likely serves as a lure to a phishing or malware distribution site. The document also contains a large number of links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt to mask the malicious redirect.

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=interrogative+adjectives+worksheet
    • http://files.whstheatre.com/uploads/1/3/1/6/131636984/gotusufo-tofutitoramal-miwulonojawulej.pdf
    • http://files.hbsubculture.com/uploads/1/3/0/7/130738621/6284164.pdf
    • http://wegesi.sharpeningonsite.com/uploads/1/3/0/7/130776334/senodufezo_revalu.pdf
    • http://files.nwtfloatplane.com/uploads/1/3/1/3/131379054/5791702.pdf
    • http://files.iodemargaretstokespetrolia.ca/uploads/1/3/0/7/130775002/3653561.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/4093/7896/files/93286909669.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2068/files/error_handling_in_php.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/belimo_actuators.pdf
    • https://cdn.shopify.com/s/files/1/0430/8146/6005/files/95910195670.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7592/files/kill_yourself_pink_guy.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8076/files/cours_brucellose.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rojifibopi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3209/1546/files/pivademuvazagorazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/90862805525.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/55068887125.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5790/files/83494065289.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7352/files/jokugokiwoviwab.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1299/files/nawewuvetepadogodedewi.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_off0000942d.bin
2dd53b65822b932fe1bef5857196a20e1f0f4b7601ee717be004a2221c6f44ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x942D 5396 bytes
font_01_sfnt_off0000a69f.bin
8c16f275f0e7efe2afb1a31aa63d0d27243f953d1d187ec90d72936ae50467dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA69F 10748 bytes

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