Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5bc961ea68c4a9c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-22 08:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: effe5510ef83fc68c9c523324270c870 SHA-1: 3b9c7fabe00aa3c3004ea546d118968683adb93c SHA-256: a5bc961ea68c4a9c37bfabfe6b60f20128009721314427f85bb4a6e390759e07
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links. One critical heuristic indicates that these links point to known malicious redirector infrastructure, specifically 'ttraff.ru'. Another heuristic identified a PDF link farm, with many links hosted on 'cdn.shopify.com'. The document body contains the URL 'https://ttraff.ru/pify?keyword=adjective+comparative+form+examples', which is likely used to direct users to malicious content.

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=adjective+comparative+form+examples In PDF document text
    • http://files.mandanparade.com/uploads/1/3/0/7/130776273/kuvikexup_fasipuxofuzepib_fenokuninuwugud_nixigazopi.pdfIn PDF document text
    • http://files.helen-richard-hamblin.com/uploads/1/3/1/6/131636654/2790394.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/1/0436/5815/0046/files/39627227874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/37017639505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7769/2581/files/define_behaviour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/weight_lifting_program_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/25364230609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/nawosurugavafifuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6240/1947/files/xikipuwute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/temakivoligukolateja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/60270482043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/kosubap.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 1

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_off000062b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B9 5496 bytes
SHA-256: 4c7ebed81a5347ae43ebcc2b35ae86edaabe3ae6ccfbf4c1cb713176bad5d289
font_01_sfnt_off0000755d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x755D 13628 bytes
SHA-256: 463849a1b0460cd417a959b3beee951c0a16a74c4a416c1899f92f35b9f57dbd

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