Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c577745ed85e14…

MALICIOUS

PDF

40.1 KB Created: 2020-08-14 22:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34649941c4b4ed14f1394cd13cb49f59 SHA-1: 8f6cc23a11a73a6d4b12ebd29096c83e8ef55b1d SHA-256: e4c577745ed85e14a47da7f9cca27cea2a6c7aef1420bb3e4cf6559d4dd74474
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'ttraff.com', which is likely used to obscure the final destination of the attack. Another heuristic flags it as a PDF link farm, suggesting a potential SEO poisoning or content-scraping abuse. The document body contains a URL that matches the redirector heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=guide+michelin+corse+2018
    • http://files.buenprovechoblog.com/uploads/1/3/1/6/131636941/vofivetiko.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9904/files/28050207561.pdf
    • https://cdn.shopify.com/s/files/1/0429/1448/0287/files/paneguwewomaxolidenizif.pdf
    • https://cdn.shopify.com/s/files/1/0429/9387/7145/files/mapa_metro_londres_zonas.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/bollinger_band_trading_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/negritude_movement_in_african_literature.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/breast_pump_pigeon_manual_review.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/65963062195.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3714/files/vakoxulabuva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/fojugazopaxevofipuveliwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/advanced_water_and_wastewater_treatment.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ca0.bin
4a74f208a734183b7485314b7d28619ce29fd854f6f1463225d7430fc40b2cae
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA0 5520 bytes
font_01_sfnt_off00006f42.bin
df55bb6d95e15141f7b94e5eafb03e3c169ffedcaf61b6bc8b00351e02e5b202
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F42 11268 bytes