Malicious PDF — malware analysis report

Static analysis result for SHA-256 82bf65914476c260…

MALICIOUS

PDF

41.9 KB Created: 2020-08-07 20:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 77a17cb3cc019ca771c91db8135f8676 SHA-1: 8787e0f45aeda2190f339e0c8746870d9f94c132 SHA-256: 82bf65914476c2603201c21ba6fef7c8ac8f00a730b31a4a871efe610ed8994a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector (ttraff.cc) that is part of an SEO link farm. The document body, though heavily obfuscated, contains text related to 'Byomkesh bakshi series pdf free download' and includes the malicious redirector URL, suggesting a phishing or scam lure. The ML classifier also strongly indicated 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.cc/pify?keyword=byomkesh+bakshi+series+pdf+free+download In PDF document text
    • http://files.implicitbiascleanse.com/uploads/1/3/0/7/130740110/bajofutivikikugufoku.pdfIn PDF document text
    • http://files.kfundtutoring.com/uploads/1/3/2/6/132681325/fusuzana.pdfIn PDF document text
    • http://gazajoru.rannveigkaradottirsoprano.com/uploads/1/3/0/7/130775971/xajudi_mopekufe_sukab_fudasiled.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/1/0433/3427/1126/files/notisuvewerix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/66472469598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/65264356916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/66752886443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/nokoxijeguzaxafilulis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/override_compareto_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/256246201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/wesanipevirilivikepagevuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/slideshare_downloader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/hayward_power_flo_lx_pump_manual.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_off00006580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 5728 bytes
SHA-256: 01a1b3fe14ab619e4745e6240b78620c646ca596ab7836efe24f53b9ca0350cd
font_01_sfnt_off000078ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78EE 9896 bytes
SHA-256: c50229fc0ff8236fdcafcb3a98223119078eaafb6120c88a205d1549c869ea31

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