Malicious PDF — malware analysis report

Static analysis result for SHA-256 0187e86fd63574a7…

MALICIOUS

PDF

59.8 KB Created: 2020-07-29 11:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 16239513fc472e9ab43097fcd77074a7 SHA-1: 66562a9cf06a98a5949e7b1ba4c8c3cea2ecb4d5 SHA-256: 0187e86fd63574a7a9e9aa54776baf094a6ac4e896988c47b35cf58a428da14b
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirection and a payment redirection lure, suggesting a business email compromise (BEC) or phishing attempt. The embedded link `https://ttraff.ru/pify?keyword=bookkeeping+exam+reviewer+pdf` is identified as a malicious redirector. The document body, though heavily obfuscated, likely contains text designed to trick the user into clicking the malicious link, which is a common tactic for spearphishing attachments.

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.
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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=bookkeeping+exam+reviewer+pdf In PDF document text
    • http://files.angelafree.org/uploads/1/3/0/7/130738531/e3ffa5adaa.pdfIn PDF document text
    • http://files.thebiologistapprentice.com/uploads/1/3/1/6/131607943/91bdc4c4ab5.pdfIn PDF document text
    • http://files.emdrforaddiction.com/uploads/1/3/1/4/131438835/9642580.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/1/0431/6617/1297/files/85697480285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23929268289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7478/9281/files/fimapatifopabitobarilojin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/tubikivavofigomadik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/pujivinuzanebelixufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8322/5506/files/52449263658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/firubowevibazikutejapanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/59023825084.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_off0000ae05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE05 5192 bytes
SHA-256: 3023df14212ae4442b78c9ab9d5e378966cc526254124000ee144ba032a0cb2f
font_01_sfnt_off0000bfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA9 10252 bytes
SHA-256: a31b15b0262f3be15f3f0424eb6a69d0db22adae9c7146c5d8e2dd42d21876b9

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