Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd1bbc6533d5795…

MALICIOUS

PDF

40.9 KB Created: 2020-09-16 18:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d33ecea0ea39efe80942978f4c443544 SHA-1: 6e8305345d953cc94f59ba46d390b044f1cd2760 SHA-256: 0bd1bbc6533d57956978ee0e21a7cad7621c3f5ca1d4241fa02cb39760899a05
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a heuristic firing for linking to known malicious redirector infrastructure, specifically directing users to 'ttraff.me'. The document body, though heavily obfuscated, contains text that appears to be a lure for a "Game maker studio manual pdf". The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute 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.me/wix?keyword=game+maker+studio+manual+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/9629/9937/files/mitotic_spindle_forming.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6707/files/pitojejarapifoluvive.pdf
    • https://cdn.shopify.com/s/files/1/0454/8689/9350/files/calculus_11th_edition_larson.pdf
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/analiticka_geometrija_knjiga.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9448/files/jukezuxaxofumupokatopamit.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/kelly_s_theory_of_causal_attribution.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/chaotic_sword_god_novel.pdf
    • https://cdn.shopify.com/s/files/1/0465/8787/1397/files/57241188519.pdf
    • https://cdn.shopify.com/s/files/1/0437/9577/5650/files/soxizugi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/bukirijof.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/52993269808.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/dolukagolipozuku.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_off00005440.bin
779dbeb795c5f7d3638900133cfa0a5cd95aeaccedd39195acb826a8aa4e37f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5440 5164 bytes
font_01_sfnt_off000065bc.bin
8240be4e022d2183a58f50c3542677e1c08911ddcace072b811e88205057d641
pdf-font-stream PDF embedded font (sfnt) at offset 0x65BC 10340 bytes
font_02_sfnt_off000088f2.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x88F2 4324 bytes