Malicious PDF — malware analysis report

Static analysis result for SHA-256 067571f55519d767…

MALICIOUS

PDF

50.3 KB Created: 2020-08-10 16:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 314e7727f7930345158c79f18c98ba28 SHA-1: 64ae49d81218e4d1ab08bec2d168d1d7a4814ca7 SHA-256: 067571f55519d767e32ee91ba72887581f2de2b66900eaa6caac5b9b19b385fd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, disguised with a keyword related to diabetes. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/pify?keyword=dieta+para+diabeticos+tipo+1+pdf
    • http://wogebez.thegracefulbox.com/uploads/1/3/1/3/131380213/f22730f.pdf
    • http://xudanikis.rewardingparenting.com/uploads/1/3/0/8/130873826/zipoxuvopu.pdf
    • http://files.1550art.com/uploads/1/3/0/7/130740625/d7db896814903.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/alergia_a_los_aines.pdf
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/durisifanapadogubejaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/98194518370.pdf
    • https://cdn.shopify.com/s/files/1/0451/3444/6746/files/sudox.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/relonodu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/hosting_website_on_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/tefivekurazajusoxed.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/jiwuzodusemuzagajatir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49726552648.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/patebesesilane.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/energies_renouvelables_au_maroc.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_off0000770b.bin
c4204c30aabed385f6485b2550418f0938aac195a3b87630ceba4f4691010894		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770B 4992 bytes
font_01_sfnt_off00008810.bin
cb663c56a7dcf666490c87b40b102bb698ab2e1251eaab26ab96a04a27819bcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8810 11260 bytes
font_02_sfnt_off0000acc4.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACC4 4324 bytes

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