Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9c91d0541efc98…

MALICIOUS

PDF

63.0 KB Created: 2020-07-31 14:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b47aecebaaa719688ad5f0cf48bc7352 SHA-1: 413d0c4f647802c21e611ad381fa74f6c93189ae SHA-256: 7f9c91d0541efc98551565cd9792d410609e02aaec3cc0433582ead720727cd5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high number of embedded links pointing to redirector infrastructure, specifically identified as a 'PDF SEO Link Farm' and 'Malicious Redirector Link'. The primary redirector URL is https://ttraff.ru/pify?keyword=alcalosis+metabolica+pdf+2020, which is likely used to funnel victims to malicious sites. The ML classifier strongly indicates maliciousness, supporting the conclusion that this document is designed for malicious redirection.

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=alcalosis+metabolica+pdf+2020 In PDF document text
    • http://files.isleypercussion.com/uploads/1/3/1/4/131484133/0bbc4e47eb0a2.pdfIn PDF document text
    • http://files.skippysfrenchtoast.com/uploads/1/3/0/7/130775734/rijepidokasewama.pdfIn PDF document text
    • http://files.townsendchemistry.org/uploads/1/3/0/8/130873718/4532037.pdfIn PDF document text
    • http://files.smamusic.com/uploads/1/3/1/4/131483423/kodugijusog.pdfIn PDF document text
    • http://files.karenpmorrison.com/uploads/1/3/0/7/130775137/jesetosot.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/1/0437/7251/0362/files/befukedidisag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3762/0386/files/60132454179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6054/3138/files/47314143575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/20119536114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8787/1646/files/vitebowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/xamiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/51216505668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2535/7210/files/90464681425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/xewozibebis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/41472639186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/79489174788.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 8

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_off0000b8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D6 5292 bytes
SHA-256: 44e2df8ef3fbe59c33dc8e6099413b38886b43ce2e9b5693fd077342b0365424
font_01_sfnt_off0000cad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD1 10552 bytes
SHA-256: 0a7d53283193fd4108764d335816ece76dd617cefba0cb2c1fa3b2addb7dfd7a

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