Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f3c663a6fe3ead…

MALICIOUS

PDF

45.2 KB Created: 2020-10-15 22:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b289ae4c581abf6e79c81ba410790edf SHA-1: 2b587b137d365884c4da745b09b5032103b73ed7 SHA-256: e4f3c663a6fe3ead457fdadb9f0c5e571936f877f6d5ce9ae519504c3dfda278
134 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/strik?keyword=lx100+ii+user+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f888a0c5df2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f8816bc9e269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f8756e276642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5f880021bc021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f87234ca4f28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87fce267f84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5f88992e6e84a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0d05c6a-4876-4fdd-a839-172cdea8a639/53378655778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7639/6227/files/monster_legends_warmaster_tier_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4062/7614/files/14708718856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/32994309457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5883/1772/files/4538153644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/raborubibajofon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7248/3228/files/nuwesetivopupedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8079/4780/files/tumasugoxotiperogigepeto.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000673e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673E 3724 bytes
SHA-256: ce22c8eaa1f53a77d563481fc3f0abc202627ce0e69ac912df19b60822d178aa
font_01_sfnt_off0000747b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x747B 5036 bytes
SHA-256: 32e980f99c96002a82fa55e135431ccbe1b5746907db331a4cd560653b461176
font_02_sfnt_off0000857e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857E 10060 bytes
SHA-256: fa7a036b10405162f6f27079a94bac9bf7a45eaa85fe1ff1e4b236fee7286a7e