Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6186451f4889d7…

MALICIOUS

PDF

47.8 KB Created: 2020-08-05 06:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a92fbe621e7bb75b5e8c1beb80ffd1a8 SHA-1: 5a84e8cf5ddd99074f3eca55514e0d5f62c1a343 SHA-256: cd6186451f4889d7a057915f605ed97b7069894910d2aba52215999e933ec4ad
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the text 'Biology textbook pdf high school' and the malicious URL 'https://ttraff.com/pify?keyword=biology+textbook+pdf+high+school', suggesting a lure to download potentially harmful content. The presence of numerous Shopify links, some benign and some potentially malicious, further supports the link farm heuristic.

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.com/pify?keyword=biology+textbook+pdf+high+school In PDF document text
    • http://files.jamesbrearley.com/uploads/1/3/1/4/131406403/kojilitobu.pdfIn PDF document text
    • http://files.normanconquest1066.org/uploads/1/3/0/7/130776821/buwuv_xodoxadix_rigajefu_dekesovulede.pdfIn PDF document text
    • http://files.martiniboxers.com/uploads/1/3/2/8/132815343/dofes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/90441596834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9653/9290/files/plantas_alimenticias_no_convencionais_valdely.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/big_anthony_and_the_magic_ring.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5044/2652/files/74379883328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/jegemefixetigulamumad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/how_to_talk_in_vrchat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8981/1861/files/83387371725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/jodaziwesevibatig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/64928268524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/wufof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32177526878.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7025 5216 bytes
SHA-256: 2c16c570d1debb1bf83f558876e31b1e3ac82b9c5e119da7486a5d5ff55ce569
font_01_sfnt_off00008202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8202 9968 bytes
SHA-256: c9b77c0287c8a1b61edfc1b0ff68e5240b3397cdc2beaa57c106b21d6d346556
font_02_sfnt_off0000a42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA42B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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