Malicious PDF — malware analysis report

Static analysis result for SHA-256 6765bc6b90029443…

MALICIOUS

PDF

36.2 KB Created: 2020-08-08 12:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37ada630f93054d5b379c7d3b58b1b75 SHA-1: 322ba1124f2f3128030495ca9891bd354608f8be SHA-256: 6765bc6b900294430e379f4109d31942f9999b85851357aa820ad01e63c67acd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=anselm+grun+pdf+gratis'. This indicates the document's primary purpose is to redirect users to potentially harmful content, likely a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=anselm+grun+pdf+gratis In PDF document text
    • http://files.oboeandbassooncamp.com/uploads/1/3/1/3/131380895/5621334.pdfIn PDF document text
    • http://files.readysetgowebsitedesign.com/uploads/1/3/2/6/132680831/8051818.pdfIn PDF document text
    • http://files.millbridgewi.co.uk/uploads/1/3/1/6/131606502/jugajowiboroxiren.pdfIn PDF document text
    • http://files.brittgodwin.com/uploads/1/3/0/8/130874566/9f99da81f.pdfIn PDF document text
    • http://nudijixuj.stepin2myoffice.com/uploads/1/3/1/4/131437812/40ec4bb997139.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kafojisiguzisov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/fakav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9432/7975/files/88303178715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4270/0455/files/65890897421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/53671212642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/60156733369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0246/9285/files/funoseludakelidovomub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4910/6073/files/batman_o_cavaleiro_das_trevas_hq_edio_definitiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/tuzakipulupuzelozezidil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/judemarunapegexixekoresop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1958/2110/files/budokalal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4717/2768/files/64587478995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8106/3838/files/34575309562.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_off00004d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D07 5348 bytes
SHA-256: ecedb89667cdb84a6d228d2368d1f8fe2e3b5a127f68672469b1196890740cca
font_01_sfnt_off00005f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1F 11856 bytes
SHA-256: cc4d6a5e29995653ea8ec07d1656d176ae151cdd3708a25831f3eeb6f2c53204