Malicious PDF — malware analysis report

Static analysis result for SHA-256 732b00580ea7a3ee…

MALICIOUS

PDF

46.5 KB Created: 2020-08-05 07:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a58c6a514c3ebc424271c2d15fc4a612 SHA-1: 5c8a2278216273d1cd9b79132ed694f2c6b88bb6 SHA-256: 732b00580ea7a3ee7ee732adf495ee6e282de81eb4f2e9fff791e65f3109776f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirector infrastructure designed to obscure the final malicious destination. The primary malicious URL identified is ttraff.ru, which is associated with a link farm heuristic. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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.ru/pify?keyword=washing+machine+troubleshooting+guide+pdf
    • http://files.seatoskycheer.com/uploads/1/3/2/6/132682822/d635c9ca.pdf
    • http://files.samtmadeit.com/uploads/1/3/0/8/130874422/1015722.pdf
    • http://files.productionsbysheyla.com/uploads/1/3/1/3/131380005/6332126.pdf
    • http://files.rupertstream.com/uploads/1/3/1/4/131483217/14cc9e2f207d.pdf
    • http://files.fillmaninsurance.com/uploads/1/3/2/6/132682124/bitamikuzak_jemiwuvixubowa_werovisejupoxe_xatawudopizojim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/58790975850.pdf
    • https://cdn.shopify.com/s/files/1/0445/2777/9999/files/acid_alkaline_food_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/3669/6999/files/linepepanuwulakasetox.pdf
    • https://cdn.shopify.com/s/files/1/0438/3840/6806/files/tezotuje.pdf
    • https://cdn.shopify.com/s/files/1/0434/0259/2410/files/rituva.pdf
    • https://cdn.shopify.com/s/files/1/0437/4845/8647/files/the_5th_wave_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/biblical_hebrew_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/cetoprofeno_eurofarma_bula.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/nobiriredazinakuperig.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/30430537761.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/dafakeposonorarurad.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000699a.bin
f0818aeb2fade351e4ceaf12dfa7e25866bb9ded5596763c59a6d7e95eb646df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699A 5604 bytes
font_01_sfnt_off00007c74.bin
85b32fd19c935e536238c7488ceb8c90cade0b3df454e706be288ebd3bd8f231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C74 10052 bytes
font_02_sfnt_off00009edf.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EDF 4324 bytes

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