Malicious PDF — malware analysis report

Static analysis result for SHA-256 095788841db434dd…

MALICIOUS

PDF

47.3 KB Created: 2020-08-12 07:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93d212fad4fa8af10e197f469d303148 SHA-1: 8faf831e35e77814eec42304f4248d1d795ae2e2 SHA-256: 095788841db434dddeda9afeb188fc095ccb0c5bda763b0434f6ec276f27f082
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=auditoria+contabilidad+pdf'. The document body and embedded links suggest a lure to a link farm, likely for SEO poisoning or to distribute further malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=auditoria+contabilidad+pdf
    • http://files.beeftubes.com/uploads/1/3/1/3/131398025/c45391c08.pdf
    • http://files.yourvintageattic.com/uploads/1/3/1/4/131453436/1b0ee563b6a0.pdf
    • http://files.onesaint.org/uploads/1/3/1/8/131856212/xuwefexol_pumuluwizuw_kidawuxegoxa.pdf
    • http://poxixal.wraparazzi.org/uploads/1/3/0/7/130739561/8024511.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2886/4409/files/gitagomixibojewob.pdf
    • https://cdn.shopify.com/s/files/1/0436/5844/4958/files/bixizotupowelexe.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/noxejuloti.pdf
    • https://cdn.shopify.com/s/files/1/0434/4273/3221/files/21229901655.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/interior_architecture_magazine_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0433/8873/1543/files/68211949456.pdf
    • https://cdn.shopify.com/s/files/1/0440/5306/9974/files/search_inside_yourself.pdf
    • https://cdn.shopify.com/s/files/1/0444/8341/2135/files/windows_repair_tool.pdf
    • https://cdn.shopify.com/s/files/1/0429/4672/3996/files/81843960294.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/80409840356.pdf
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/5816697795.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000646a.bin
a242a289650e6f2aa8b8faea40d724a06402189741187bba4083447973669037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646A 5100 bytes
font_01_sfnt_off000075cb.bin
615f7616fb6f069071afd56128b589d553dd3bdaa5484d441599569345e20acd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CB 11048 bytes
font_02_sfnt_off000099c2.bin
d781c508aaf473e50263a6aabc3f4161b7fa10724c54bb8d35addee38a7f1c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C2 16164 bytes

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