Malicious PDF — malware analysis report

Static analysis result for SHA-256 0596149fbee1e699…

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 14:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db5ad1e6fdbe2886c593f3baa3074e85 SHA-1: 4f19a6850184b6275d31322da6046b19c59a26e6 SHA-256: 0596149fbee1e699615962ff274264e46075a0a6752e46e4b11ede2ec5dcc3d3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or redirection scheme. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to a malicious site via a deceptive link.

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/wix?keyword=applied+mathematics+1+diploma+questi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/38263876087.pdf
    • https://cdn.shopify.com/s/files/1/0430/5790/5818/files/2615698310.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/kotomuwolojaganur.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/pabasasuxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/nacionalismo_economico_de_salazar.pdf
    • https://static.usrfiles.com/ugd/4dd980_ec69d670cc6f486781b913856f803aa5.pdf
    • https://static.usrfiles.com/ugd/6924eb_f680702bee2f4dc1b75f658dbbebf479.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_753d552936484f849ab062b359f542dc.pdf
    • https://cdn.shopify.com/s/files/1/0439/3720/2344/files/71714645032.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/xopizegi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/vinaverul.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/zalorekinujegajosetejo.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_off00006114.bin
27edfc149ba4d3139a68c476e99d5ce12b8d3d8264fdb74f62a30da9fd27c2ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x6114 5384 bytes
font_01_sfnt_off00007341.bin
1dbbdc6a70592f529e3d2eedace415282c3f31e6b8b631a94c93d2dc4f1eaead
pdf-font-stream PDF embedded font (sfnt) at offset 0x7341 15096 bytes