Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75c8de414e6548e…

MALICIOUS

PDF

39.3 KB Created: 2020-08-19 02:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8d5c6e63cc3d809393929080bb1c18e SHA-1: e0ecf9754ebfd63ddd19552997690194d9599454 SHA-256: a75c8de414e6548e7d19f8f4fd82ca8870cb8928abeba6e860232b46d82db864
254 Risk Score

Malware Insights

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

The PDF contains a direct link to a malicious redirector, which is part of a link farm designed to obscure the final destination. The document body and heuristics indicate a lure for recovery secrets or private keys, specifically mentioning 'Bitcoin sv address format'. The presence of numerous external PDF links, many hosted on shopify.com, suggests a tactic to evade detection and distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=bitcoin+sv+address+format In PDF document text
    • http://files.goldbergacademy.org/uploads/1/3/0/8/130874431/6026840.pdfIn PDF document text
    • http://files.themathprofs.com/uploads/1/3/1/0/131069812/redozezubiperu.pdfIn PDF document text
    • http://files.mcyouthfootball.com/uploads/1/3/0/7/130738852/fc897019.pdfIn PDF document text
    • https://mycrypto.toolsBitcoinIn 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/1/0435/5152/2977/files/27344340018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/78226006583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/caliper_mitutoyo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74251218784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/povurewaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2825/8726/files/whatsapp_wedding_invitation_card_template_psd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/17105121614.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
🗂 Part of campaign: kaushikthallapally.com 9 samples

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_off00005a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0C 5244 bytes
SHA-256: 44232d0d8cdda8d2c0bbfa0d9e8a1b1bb85b8f50875b4e611ec039d71f149b42
font_01_sfnt_off00006bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC6 11004 bytes
SHA-256: d78ac77fe1febd72325ae391b54926b58695d63c7bf95fd10e2aa2bf6a5e92ef

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