Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35b5109f29d42f4…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 00:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3b08c7d7f9e0472444cd32a3caaf69a SHA-1: 582227e9af7a8242f680265818b8c979dbaf32e2 SHA-256: d35b5109f29d42f4acac250846c5da5ef70d366c52fda0df7065d2cd9b666f85
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link, presented as a 'biological classification pdf download', redirects through a malicious domain (ttraff.ru). This suggests a phishing or redirection attack aimed at delivering further malicious content. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent to redirect users to harmful sites.

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=biological+classification+pdf+download In PDF document text
    • http://files.djvicny.com/uploads/1/3/1/6/131637631/4820189.pdfIn PDF document text
    • http://files.paisanoperformance.com/uploads/1/3/0/7/130776206/falum_wopirezenetoled_wuzewidalasiruj_vadizutogule.pdfIn PDF document text
    • http://poxijetiz.gillianlakethompson.com/uploads/1/3/1/0/131069934/petutoni.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/1/0430/0151/2095/files/burrito_boyz_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8372/5990/files/bootstrap_3_carousel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/zidegosagakidakopemobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4989/8399/files/59912768319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/72391580212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/jozuso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/47572467201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vofelowuloluvazoriwonub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/51053507415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/eager_beaver_chainsaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9930/6648/files/60770151501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/tijulafejapakikeziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/fema_is_700_answers.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_off00006075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6075 5368 bytes
SHA-256: e639842672e9851b6d71c9c39d9c2b8df70059ecde734419827491e7e554abd6
font_01_sfnt_off000072ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72EA 10272 bytes
SHA-256: 414e779cd0ad78f94403a2ebc6bcc4a5387de28d397e260401b0399b18c510b0

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