Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae965c868d0069c…

MALICIOUS

PDF

43.5 KB Created: 2020-08-30 01:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07f19637023f8a95645cb92734465abf SHA-1: cf91738395902ad5c80ecfb4b1d6b6328eaac886 SHA-256: 5ae965c868d0069c09a46e466057d0cf12df1b06d20a0d8241cdc5459ce30e2c
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for malicious redirector links, specifically pointing to a URL designed to trick users into downloading an Android application. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=2k17+apk+download+for+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/nobuneve.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/pamisojilogakepux.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/milestones_of_development.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/nuzovofifovimoxib.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/6461210269.pdf
    • https://cdn.shopify.com/s/files/1/0459/9011/7538/files/castaway_1986_movie_free.pdf
    • https://static.usrfiles.com/ugd/7f46b5_eb3825fc53e04c9c9f5446381949f31f.pdf
    • https://static.usrfiles.com/ugd/362633_2005c375f8774e26b4cf779589826634.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba607913a8904a358d37d38dc01a3227.pdf
    • https://cdn.shopify.com/s/files/1/0434/3060/9063/files/capablanca_endgame_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/circuit_breaker_abb.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/15577540526.pdf
    • https://cdn.shopify.com/s/files/1/0435/7321/5387/files/usp_797_guidelines_for_sterile_compounding.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/alien_skin_exposure_7_presets.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c8f.bin
274921bbe32fd631604052efe163bbd98b574b636d285490446df07cbb2ab4eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8F 5184 bytes
font_01_sfnt_off00007e5e.bin
391b8c71ce42ef227a1c6aaf2d7107ccc0a805466d8abed7dbe639c6ff08ba57
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5E 10128 bytes