Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a864eadba05e0c6…

MALICIOUS

PDF

47.7 KB Created: 2020-08-04 10:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a02cfaa44cf6a06101bc842c809ca74c SHA-1: e98eab6abc3b4af484cbd8b81bdd19699fa996f6 SHA-256: 8a864eadba05e0c6411ded38b3947201c30e8fbfb347a36be1536864dbce1163
194 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm or SEO manipulation scheme, evidenced by the high number of embedded external links. The primary malicious link, 'https://ttraff.ru/pify?keyword=types+of+cognitive+biases+pdf', is flagged as a malicious redirector. While the document body contains text related to cognitive biases, the overall structure and link distribution suggest a malicious intent to lure users to potentially harmful sites or to artificially inflate search engine rankings for the linked content.

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=types+of+cognitive+biases+pdf In PDF document text
    • http://files.suitedreams.com/uploads/1/3/0/9/130969761/885419ab6ae9a.pdfIn PDF document text
    • http://files.hiddentreasureboxers.com/uploads/1/3/1/4/131408954/nikunanefo_jumujebute_kevarazemaf_wolus.pdfIn PDF document text
    • http://files.mason4kauai.org/uploads/1/3/1/3/131380845/zogagunakefe.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/1/0430/6419/7273/files/9661735938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/sowugezuxodow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1729/8342/files/vasosexedosilonexer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/count_number_of_files_in_directory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/sipepojalotepurumiwunad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/weraloxejizidareler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6893/8658/files/vudorazoguvoreregobemef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/10443171473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/29212855842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/jovufagoxemeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/rudatezimeboxamenowim.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C5 5448 bytes
SHA-256: 8b4d7c7ba15aef1b0b3b124be3fd4c0cabf57fbaa4971f3a0ecbfc3bd15d5fd7
font_01_sfnt_off00008569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8569 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00008df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF6 10432 bytes
SHA-256: efcd2269991090073b5d9ef098cb9c0e5e8bf715fa5a5693610e81633460217d

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