Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f95083c4ee0ab76…

MALICIOUS

PDF

130.9 KB Created: 2020-08-12 10:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1c84699298d67cf893d50711bbc33bd3 SHA-1: 6ee9f5184ae880b8bff407f30dc57e30bf779614 SHA-256: 9f95083c4ee0ab7651031542309f03f5b35f60523331d43b6364c9801bcbe515
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=medical+biochemistry+by+chatterjee+pdf+download', is designed to trick users into downloading content by appearing to offer a free book. The PDF also contains a link farm, suggesting a broader SEO poisoning or spamming campaign. No scripts were extracted, but the presence of malicious URLs is sufficient evidence.

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.cc/pify?keyword=medical+biochemistry+by+chatterjee+pdf+download In PDF document text
    • http://files.judelane.com/uploads/1/3/1/0/131070751/e10d7adecb96a.pdfIn PDF document text
    • http://files.themealsmaven.com/uploads/1/3/2/6/132681294/2a0d763fedb.pdfIn PDF document text
    • http://files.kendrakoivu.com/uploads/1/3/0/8/130874113/jejup_vumido_bajigerabijuro_fopajuvixugali.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/1/0453/8872/6440/files/shrimad_bhagwat_geeta_in_sanskrit_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/senesupekeleji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/wuwitirakemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/kokelifasumovajofib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2501/4684/files/wukaguxag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/4179642190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/niregaponozaxofekamusofef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1906/7815/files/dirurubeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7670/4669/files/case_hardening_of_steel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6177/2442/files/75504633953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9168/8610/files/centroid_of_common_shapes.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_off0001c224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C224 5812 bytes
SHA-256: eb79c204b0f9e0dc750cb9fff44d6de16328c69c0bfba593aaefb1377425337d
font_01_sfnt_off0001d5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5D8 12524 bytes
SHA-256: 0201a9c9760034cd363f0c6ab26354b5cb8dc55d35a27f3b880774e16633e33d

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