Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9f8e1699a69567…

MALICIOUS

PDF

41.2 KB Created: 2020-08-11 07:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a5b203fa34023b14d03be84828f75d8 SHA-1: 33815cddf464c5e215fb347e4eca32222f63425f SHA-256: 5e9f8e1699a69567047644a9841a3b8d7294bfdfd84148b15dd1ad49cd08ba06
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but the primary link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to business opportunities and the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier strongly flagged this PDF as malicious.

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=business+opportunities+in+kenya+for+youth+pdf
    • http://files.captredentertainment.com/uploads/1/3/2/7/132740399/fc571314b71947.pdf
    • http://kolojebak.pottawattamiecountydemocrats.com/uploads/1/3/1/4/131452883/gikamiluda-zomobedogu.pdf
    • http://files.delicatetouchhealingarts.com/uploads/1/3/1/4/131406435/3103191.pdf
    • http://files.christianchildrensentertainment.com/uploads/1/3/1/3/131398308/7604517.pdf
    • http://files.beautifuleggsbyjane.com/uploads/1/3/2/7/132740997/278479.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/15850573898.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7185/files/dukojimevasawem.pdf
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/37663520035.pdf
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/77223115730.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/defupovagulenugizodevi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7504/2457/files/luvibigubotujuro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/bixisulojitamodoraveli.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3493/files/kirchhoff_s_current_law_example_problems_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/bugegudodagoramaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/1741/8405/files/ordinal_numbers_1_100_exercises.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_off000062af.bin
c557c3a9f1aa86094b21b5f43e1e9f6ad0389d014c79d9bb150a5bab82624c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AF 5312 bytes
font_01_sfnt_off000074c0.bin
6518e47c499a76dcbe2f53c773803012b1e88f1c8cd982805d3ecb3d5c118755		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C0 10656 bytes

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