Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98174bca558e194…

MALICIOUS

PDF

38.2 KB Created: 2020-10-03 07:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 13f87e287ab16143cecfd061efcaf470 SHA-1: a5c2acdea0f20a375926bcf0db6305c0782dc22e SHA-256: b98174bca558e194e671378399c81532b79da3c55f5cd3d5181f4b93299fc8ff
194 Risk Score

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.
  • 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://ttraff.link/pify?keyword=mark+gungor+flag+page+test In 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/acd192ea-96b0-4fb7-bcad-21a200e3dd37/tigibavenazomaxoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d691f05-c124-46f5-a8e8-10986035a99a/rolirazalavopidup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8fcd325-1d4d-4644-ad08-b3b2a4ed5959/tirezar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0749bc19-e253-48bf-974c-fdf9d2443f29/95223937640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84cf5c1-067a-448f-85a9-e393a6941a62/85573149547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3122/2682/files/90270492475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/golden_carpenter_bee.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1932/0992/files/91127998235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0981/7251/files/76560110087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cf7678-0797-4492-ae49-db32402c7bd1/78525887590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796335d2-2819-412b-aa6e-bedf46bf088c/gubisuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db11d6c-e7b5-49d5-bdc7-8b8b6d9f655b/tizibilepupowatug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31250f46-9137-4acf-9009-50b83758c5e3/6887912636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c90bbcc-28bf-4742-a5f9-72d8a5e3b271/8826168434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7549cc10-9e61-46a0-b0eb-ac3321916f14/pafegaralazararasaxirage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d92740-e153-44ba-8705-11727c83214f/kusadovagozogafomez.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56AB 5140 bytes
SHA-256: 6a56cf6751d719e8955b99760cc5c565219350efadd18c9f5d64c6ee1b60441e
font_01_sfnt_off0000684f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x684F 10444 bytes
SHA-256: 3253829132818f75d8a85c200167024d91aa4ccd90f59de8de7d8d83933a4ca3

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