Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7c3c93f5d498b9…

MALICIOUS

PDF

46.0 KB Created: 2020-08-08 16:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b825bfddf1f4e52973b0a59ccafc355 SHA-1: da939ebb64918bfd2b54178f171145183137c888 SHA-256: 6c7c3c93f5d498b9b5195040f949fc2d1910dc51b5e4c6bd27d833956e6d63ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external resources. The primary malicious link, 'https://ttraff.com/pify?keyword=jurnal+tentang+ekstrak+belimbing+wuluh+pdf', is identified as a redirector to malicious infrastructure. The document's structure and content suggest an attempt to create a link farm for SEO manipulation or to direct users to potentially harmful sites. No scripts were extracted, and the document body is heavily obfuscated.

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=jurnal+tentang+ekstrak+belimbing+wuluh+pdf
    • http://files.jtainnovations.com/uploads/1/3/2/6/132680808/voloxodolobakuwuv.pdf
    • http://files.evge.us/uploads/1/3/0/9/130969873/9878695.pdf
    • http://files.usfproject-benitez.com/uploads/1/3/0/7/130738955/5944962.pdf
    • http://vasijo.timesofmineralpoint.org/uploads/1/3/1/4/131452883/5457748.pdf
    • http://files.jjesmerarchitecture.com/uploads/1/3/1/8/131871740/b927d6f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/modaporubewibodoxura.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/funivajujosowonenokopewuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/wafonudod.pdf
    • https://cdn.shopify.com/s/files/1/0430/9254/1589/files/nelefekukizoruranofugatad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9652/files/39091765427.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/fixosunigokidusovuneri.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9521/files/bowflex_xtreme_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8822/files/89985110032.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/14287817753.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/83111049298.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5881/files/jspdf_autotable_header_font.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/mejizovedavaduvokovufumu.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_off0000752a.bin
cef5d729c78c25dd3e665cf81d2c937e1720d322aa3bba0c7c99bd3e4edb67b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752A 5740 bytes
font_01_sfnt_off00008896.bin
3500df36451a2916ca72ac2d8396b33ff3168c8c8cd6b881973b378058a3ba35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8896 10032 bytes

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