Malicious PDF — malware analysis report

Static analysis result for SHA-256 8050a69b6afb982d…

MALICIOUS

PDF

37.5 KB Created: 2020-07-30 20:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91e61d28d7d2a76abe687f1b4f2d41c1 SHA-1: 666a4b7f376f74219ce081058a3190287329011a SHA-256: 8050a69b6afb982dec0e79d5bd96bbd1ad9bffde4889067d15d8b5e773c034c0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to redirect users to a link farm, likely for SEO manipulation or to host malicious content. The primary redirector URL is identified as malicious. The ML classifier strongly indicates maliciousness, and the embedded links suggest a phishing or malware distribution attempt.

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=principles+of+helicopter+aerodynamics+pdf+free+download In PDF document text
    • http://files.varanasiastro.com/uploads/1/3/1/8/131856772/kulotonevowapoz_sufodikemoxak.pdfIn PDF document text
    • http://files.gentlestrengthbotanicals.com/uploads/1/3/0/7/130739782/5f9452beca38.pdfIn PDF document text
    • http://files.jakewarga.com/uploads/1/3/2/7/132740730/4260431.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/1/0433/0687/7080/files/pujar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8290/6789/files/buxefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/58956880585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/44559302593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2771/6520/files/68257398301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/52630275017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8529/9874/files/99642383647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/xaxegumovufujavotamufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/96190578138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/kitunobipon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/wudiz.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_off000054d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D2 5380 bytes
SHA-256: 4a6803c5eaece5a1fc87485e0dc47bbd2488e041ebade2e5c4fa01596c2877d5
font_01_sfnt_off000066f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F0 10036 bytes
SHA-256: 1be6e3ca2dcdde10ddcbf9e411ec5e0dafc7b70adf5591536a8916f6e1fc5404

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