Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c6c07729b5be0f…

MALICIOUS

PDF

49.7 KB Created: 2020-08-09 20:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e02c62a28d67c45665b4019b41d83aef SHA-1: bdf7943bc82b52cbb066afedfea968af195f5540 SHA-256: b8c6c07729b5be0f8fdeb6568ecdc155f479d6f13f1f6fe0bd1e2f809800dfc0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, identified as a PDF link farm. One of these links, https://ttraff.ru/pify?keyword=sumerian+tablets+vs+bible+pdf, points to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the same URLs, suggesting a deliberate attempt to obscure the malicious intent while still providing links for potential exploitation or SEO manipulation.

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.ru/pify?keyword=sumerian+tablets+vs+bible+pdf
    • http://files.sanotherapia.com/uploads/1/3/1/3/131398174/konevisusakufi.pdf
    • http://jisas.autoadvisorsnh.com/uploads/1/3/0/7/130739024/xozisikupogom_riwasepotebix.pdf
    • http://xazixa.awakeningthedivinewithin.com/uploads/1/3/0/8/130873995/xujatise.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/75047265989.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/70596971332.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/3818818731.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/sunifaruborawomoma.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/67950690659.pdf
    • https://cdn.shopify.com/s/files/1/0433/8008/0801/files/jizejunejinadonesilagomi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/entrepreneurship_theory_process_and_practice_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/mastering_blockchain_imran_bashir_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/nukor.pdf
    • https://cdn.shopify.com/s/files/1/0437/7922/7810/files/49070323026.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/gary_chaffee_sticking_patterns.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000786d.bin
69922220ff55c185c626e16e19aded9d75c8a6b3ffeca8b379ca1d48916e10be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x786D 5264 bytes
font_01_sfnt_off00008a27.bin
45784744d2bab7d019e0bb434af652fa52afcda11061334f02b355bb3db0d65e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A27 9824 bytes
font_02_sfnt_off0000abb7.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABB7 4324 bytes

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