Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a3907b19266f41…

MALICIOUS

PDF

45.9 KB Created: 2020-08-30 08:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b176ca7d1c349af9b3721233fc6a77c9 SHA-1: 9ec88b6479b6f29eaf48e133ec5e89f9f1e1d7af SHA-256: a0a3907b19266f41b1d66e890737bc9c2c0cb41120eb322ba83b6b7f1c6e5123
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to a known malicious redirector. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify-hosted PDFs. The primary malicious URL identified is ttraff.ru, which is known for redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=arabiyah+linnasyiin+pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/amazing_grace_bagpipes_music_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2364/6365/files/animales_albinos.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/xelerenabozonomomo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/70492386831.pdf
    • https://cdn.shopify.com/s/files/1/0432/0346/1283/files/ramixuvirov.pdf
    • https://static.usrfiles.com/ugd/b8c837_955a13aea1074fa1b367fd6c49cbe768.pdf
    • https://static.usrfiles.com/ugd/b8c837_02b33c0c10d24e468c5bd3c0a5cfdc32.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0cc46f18ff542b3bfe17710fee3003e.pdf
    • https://cdn.shopify.com/s/files/1/0459/7710/8647/files/juxumazipevejatanu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/82288666932.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/death_note_intro.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/articles_on_teacher_education.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/lonav.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050df.bin
4842c2eae310dc28f016f1d4c92355b39e7810403f925d9c7baa07f623867360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50DF 4840 bytes
font_01_sfnt_off00006128.bin
e8e5d31607aeaea37d659bcc74d03722579344e54395dfc57ce6e898122baed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6128 9872 bytes
font_02_sfnt_off00008337.bin
d8385657c5220ed560bf5ea66ef0ec6a0e5362dda39ab20ee04c9c9bc28d2e40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8337 17352 bytes
font_03_sfnt_off00009c6b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6B 4324 bytes

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