Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4a9933ab94959c…

MALICIOUS

PDF

61.3 KB Created: 2020-08-12 22:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 916d3e56ce48b6dc1e22a4cae4bec553 SHA-1: be30b78d36096c839dae8f918499025568917a82 SHA-256: eb4a9933ab94959c665b306becbd408ae09d0d9aada598031b974660d46338dd
274 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains a reference to this URL and mentions 'Google advertising tools pdf', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The presence of a payment redirection lure heuristic further supports the conclusion that this document is designed to trick users into clicking malicious links, likely for financial gain or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=google+advertising+tools+pdf In PDF document text
    • http://files.bookbrokers1.com/uploads/1/3/2/7/132741241/zawasoje.pdfIn PDF document text
    • http://files.monteverdimusic.org/uploads/1/3/1/0/131070678/wufatimivo.pdfIn PDF document text
    • http://files.nationalconstructionsafetyexecutives.org/uploads/1/3/1/8/131856186/c61a29.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/1/0428/9835/8432/files/rofan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/59235984689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/90053346891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/ethical_dilemma_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/nikujidujubedekumusigawej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1462/3130/files/top_secret_bankers_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7607/3125/files/vorijegadijek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/best_sociology_books_for_upsc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4591/2727/files/zegebupumikazudole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/democratic_autocratic_and_laissez_faire_leadership.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4791/9516/files/21080747954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/joint_of_n_order_statistics.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E4 5300 bytes
SHA-256: 02deb1177497bad67866109acec66049af7b911162e2ca1f85a6ae2f7a65afde
font_01_sfnt_off0000c40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40B 10548 bytes
SHA-256: 51cb7ab467eb2a496279a399f94527c7f3b7003f811a5ca5dfa1448d320d3d61