Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc174d2983c5131…

MALICIOUS

PDF

42.2 KB Created: 2020-08-08 19:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2550ebc2da9fb0da235e02b78029778e SHA-1: 7c85a2de484a670ff42c48f0f2c838cb1a6c8a06 SHA-256: 7dc174d2983c5131e427781cb93a502f8fe2f45955928531e5ff201cf5857a21
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating an attempt to drive traffic to malicious infrastructure. The document body and embedded links suggest a lure related to fitness content, likely a phishing or scam attempt. 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=3+day+muscle+gain+workout+plan+pdf In PDF document text
    • http://files.jacdellaria.com/uploads/1/3/1/4/131407952/3357610.pdfIn PDF document text
    • http://files.sareslater.com/uploads/1/3/2/6/132695568/busazazoxup_retavi_bubab.pdfIn PDF document text
    • http://rifutojot.trangmar.com/uploads/1/3/1/3/131398140/guvug_dopekamox_suzifizarev_lilixipezas.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/1/0432/2358/0830/files/49720349618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/65702199862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95610310087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/botimenofeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2597/9813/files/folevawusutade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4523/9456/files/82997285566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/6351/4012/files/2002_ap_calculus_ab_free_response.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/zikajaxewumukugozusos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5916/5849/files/91_chevy_1500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/mutuzinififibeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8701/7637/files/clinical_and_counselling_psychology.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 2

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_off00006497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 5800 bytes
SHA-256: d02e2a5078e9444903bca5a7efac6d941528b7a0e479a05eab159a3942e0e607
font_01_sfnt_off0000785f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x785F 10520 bytes
SHA-256: cba288ea7a2810539f7e5507c57a4d530192d3290a7cfd298224d548219a7270

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