Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca4f8ba8eb5a64b…

MALICIOUS

PDF

41.5 KB Created: 2020-08-06 13:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e4a682afb83ab2817f5db8520fb5df8 SHA-1: 2ba6bb96835fca3dbe7d9bdc551bc0bd8c381d23 SHA-256: bca4f8ba8eb5a64b5fc9b237844a189cff531da70252acc4191e98ad09b79cbf
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a tactic to manipulate search engine results or to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious links.

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=capacitor+value+table+pdf In PDF document text
    • http://files.mobileservicepros.net/uploads/1/3/1/0/131070572/fifovexix.pdfIn PDF document text
    • http://files.ccacb.org/uploads/1/3/0/7/130775992/1513027.pdfIn PDF document text
    • http://files.sw-publishing.co.uk/uploads/1/3/0/7/130775025/fawasujogukemuw.pdfIn PDF document text
    • http://files.dkgpistateomega.org/uploads/1/3/2/3/132303238/nifajalafive.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/1/0434/0989/9670/files/30470286171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/lotaxikomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/dafuwumejebado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/diploma_mechanical_engineering_projects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/business_plan_on_bakery_in_nigeria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/64226612484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1796/0600/files/robumuluwonisev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/36375722416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4890/2556/files/roruwukulopubemabuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/64726168393.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 4

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_off00006674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6674 5076 bytes
SHA-256: 4630eb5d65edefea42f969d82c7804c2bb9c024341153fb085af9c6765f5351e
font_01_sfnt_off000077c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C3 9784 bytes
SHA-256: e0fd70fbfe6eb9f7c87cfe56e34bb43cc0bf67ddd8851fbb442311b240489f5a

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