Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba6518001ce5fa2…

MALICIOUS

PDF

58.9 KB Created: 2020-08-02 04:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88dd2ac2a6b9e84eb2ed15652ad216df SHA-1: 6872eb4450444f6acf0b22db0e510acfba62dbe4 SHA-256: 0ba6518001ce5fa274220e24d6a9f5f7610a5cbbbca768cdf32de3ce480c1fdf
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to funnel users to other malicious sites. The document body, though heavily obfuscated, contains the same URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute the malicious content. 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.com/pify?keyword=minecraft+uncraftable+items
    • http://files.theeherbdoc.com/uploads/1/3/1/6/131606630/00a58a4905fc.pdf
    • http://files.maheshalur.net/uploads/1/3/0/8/130873907/4054790.pdf
    • http://files.blankaphotography.com/uploads/1/3/2/8/132816066/29c7b902454a.pdf
    • http://files.kelvinngmagic.com/uploads/1/3/0/9/130969080/jabotixodifuk-rulesarilut-mojutotojupiduk-nekevojide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/63400311804.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/jugusomupejowulebedela.pdf
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/13768308202.pdf
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/lezawixatesulin.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/77510746456.pdf
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/93893596536.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/turob.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/xowavosoxugozob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kesutuzijakakewinepubad.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_off0000a972.bin
f7d74ae9f880e032f4f8991bcf8e7258c8edb44ed36ce8335b86bb058000991e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA972 5172 bytes
font_01_sfnt_off0000bb00.bin
aff3cf0b7621919e8c9ac7c195b926f1ad5d93c6d69396706356ee360b60f34c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB00 10392 bytes