Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa1ab494f9ea23b…

MALICIOUS

PDF

46.3 KB Created: 2020-08-23 19:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8117d17b71fc86a7fb289b0de92efe76 SHA-1: 89d66771f8b4306cd441c0afeba021fa64232b74 SHA-256: 6fa1ab494f9ea23b0d714db2981adc7486eacd34853106303a4ba94036a3c05e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits a PDF link farm heuristic, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking PDF links, suggesting a lure to a malicious site. The ML classifier also 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=carwale+game++please
    • http://files.yecsonline.org/uploads/1/3/1/4/131453536/a6e1114.pdf
    • http://files.beautifulcardcompany.com/uploads/1/3/0/8/130814926/verolasibufagu_bizidomusoru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/club_car_ds_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9426/files/44657640590.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/jobobikikisasa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/xoruvaziravo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/gitetelexozagosepexasumus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0497/6548/files/amtrak_wolverine_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0459/2658/0375/files/nice_hypertension_guidelines_2011.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/nubibolupazurufekaril.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/64371208084.pdf
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/67812174859.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_off00006cce.bin
e8d99044e596f81a6d8f19034834eb89e2e8cf5f19640f9d423514cf8726cb53
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCE 4700 bytes
font_01_sfnt_off00007cd3.bin
668c3a4b0ec79c31e65ea47f9bd54593758d4cacbba99c49b988a28af27aca11
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD3 9888 bytes
font_02_sfnt_off00009eb1.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB1 4324 bytes