Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cffb814db095a36…

MALICIOUS

PDF

40.3 KB Created: 2020-08-09 13:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb8f8afeef43625cccbf8646cadef8ae SHA-1: f33bee6152a3222316de9cb0737be16fd7f735b2 SHA-256: 4cffb814db095a361ef7c052bf0783e27633c08c1c292bb7ec2f109ec1d154eb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=capsule+filling+machine+principle+pdf`. This URL is designed to lure users into clicking by pretending to offer a PDF related to 'capsule filling machine principle'. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains, likely to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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=capsule+filling+machine+principle+pdf In PDF document text
    • http://files.northwaystudents.com/uploads/1/3/1/8/131871701/6b9b2bec.pdfIn PDF document text
    • http://files.socialvalueworld.com/uploads/1/3/0/7/130739715/gexozo-xemevuf.pdfIn PDF document text
    • http://files.simplelifebrewing.com/uploads/1/3/2/6/132681501/xizatimela.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/1/0431/5847/0810/files/zupufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/7232579208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8914/1664/files/acst_aakash_sample_paper_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7778/6018/files/losivorosek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8708/5220/files/favip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1839/3499/files/26250693449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/darrins_dance_groves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6254/8887/files/98443943376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2862/8124/files/minejosojafokumov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/pewusefunore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5445/7254/files/98982679992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/gurezobitejeseb.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F20 5476 bytes
SHA-256: 74bc60bba777267f463adb23f28ebd72dc65738b5730dd6fd634d676f0f65643
font_01_sfnt_off0000718f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x718F 10208 bytes
SHA-256: 9caba59ab1293382c4a9ab42cdd0890ef40878164597e04c1f6a3f5c9bbb4e1b

Open this report in the interactive analyzer, or submit your own file for analysis.