Malicious PDF — malware analysis report

Static analysis result for SHA-256 168d5b579b4df4d3…

MALICIOUS

PDF

35.0 KB Created: 2020-08-06 07:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c48b44437211b001c47ab9a03a62e130 SHA-1: c009465ce087a739bbddb7f33b107e5afca94f26 SHA-256: 168d5b579b4df4d34d26fc1b1c23f6cdc5128e44aa1a9eb1ab1d793d23ddf133
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though partially corrupted, includes the same redirector URL and a benign-looking Shopify URL, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly indicates maliciousness.

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=de+cero+a+uno+peter+thiel+pdf+espa%25C3%25B1ol In PDF document text
    • http://files.nevingtonwarmuseum.com/uploads/1/3/2/3/132302872/7215402.pdfIn PDF document text
    • http://files.themcdonaldsbook.com/uploads/1/3/1/3/131381910/4f7da3797d63.pdfIn PDF document text
    • http://situjivo.emilylsteffen.com/uploads/1/3/0/8/130874197/7371067.pdfIn PDF document text
    • http://files.dellavellaremodel.com/uploads/1/3/0/7/130775109/dutokijefibi.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/1/0429/2925/8649/files/vikalozafipexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6517/2387/files/jupitusotidasowotimesodav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/79991517879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/penom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/sewowulexudutipor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojijemorewowasimagaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3178/9721/files/anisocitosis_y_anisocromia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/kufogisemogazokonajawow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/pitegemepuvalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8918/0310/files/madea_goes_to_jail_gomovies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/10169572729.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_off000046e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46E9 5456 bytes
SHA-256: 29ba6697eea33cf17233a37bdce8aa1b77786f83afdc6bc75b30fed6ed3d6a14
font_01_sfnt_off00005933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5933 10944 bytes
SHA-256: 9cc5e4919062e921de5c30ba1826a1df120ed4cdc90a407050964716f60a32b1

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