Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e62731fb1a1e9fd…

MALICIOUS

PDF

34.1 KB Created: 2020-08-29 09:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18e8a80ddbe3dfaa8fb6b9f7c82f0cac SHA-1: 0915e69ba75158628bb239490477b7fe7d047827 SHA-256: 0e62731fb1a1e9fd88a291fc626fb00cf770b63a01507feae596dc45443c42b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, https://ttraff.club/wix?keyword=el+orbe.+com%252F+portadas, is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm strategy, likely for SEO manipulation or to distribute further malicious content.

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.club/wix?keyword=el+orbe.+com%252F+portadas
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0437/8342/2109/files/discuss_kubla_khan_as_an_allegorical_poem.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/dufeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/xovogobadaxema.pdf
    • https://static.usrfiles.com/ugd/b8c837_99c046e40dcc4af7983cd09e6ce7d7d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_27eceed8fa744e81b2b2206a930b00ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce86ea05c60e4daaba669e71026153f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e2403becef4676ae52a0c0f743d93c.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b3ea172b5c2452ca0f08364a1105733.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fc549d0f0334faeb1aebdd45eb418b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_9924ba6f3a9b4606930d5e5cfdb9bdef.pdf
    • https://static.usrfiles.com/ugd/b8c837_18fb4f5e52114b188df1b35651c42c50.pdf
    • https://static.usrfiles.com/ugd/b8c837_5769e1b7c6f04deabef1f2ef0e60a801.pdf
    • https://static.usrfiles.com/ugd/b8c837_67c5535f64cc4a94b305c7f231320b18.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_off00004731.bin
fe3837bf325d7b6bbda230fbbfba664b676c690718f6a5720be6b9013a7f8623
pdf-font-stream PDF embedded font (sfnt) at offset 0x4731 5384 bytes
font_01_sfnt_off00005965.bin
542282a7d9664195211b181ea5a1b320f0f58298ca8bff98bd904072c22eba3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5965 10172 bytes