Malicious PDF — malware analysis report

Static analysis result for SHA-256 7969163087072a44…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 01:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fd9419e84b4807edadf55e1360c981b SHA-1: 7c26367b8a3717a850e64857416f3117cb55f7d0 SHA-256: 7969163087072a44adc78f14b1d47d6972a3d1f5f9d41df9cc3bdc55975f589c
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified as 'ttraff.ru'. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to distribute malware or phish for information. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious redirector pattern.

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=cognitive+science+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/c1de29_632a6d2e5e2d4f9aa8b3d55f5b6a5743.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0d94ff95558444b8022f497068e32ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_80ed5782f88e4ec5ba645ee0d45e12b7.pdf
    • https://static.usrfiles.com/ugd/43d598_4dd7badbb38f42bb8d933e6bc0bc4c27.pdf
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/balija_matrimony_app.pdf
    • https://cdn.shopify.com/s/files/1/0429/1310/4028/files/visual_studio_platform_toolset_v90.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/70306254711.pdf
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/4653421788.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/65057012344.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/high_carbohydrate_foods_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/autocad_architecture_2020_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/buzuwemegodatobaji.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9745/files/deped_feeding_program_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/62040629542.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/sipipavejiwipe.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_off0000653f.bin
52179c18f4d3b80fb254adcd9f253402f557ea8395f19a2189a3f4645cafad08
pdf-font-stream PDF embedded font (sfnt) at offset 0x653F 4952 bytes
font_01_sfnt_off00007643.bin
374467d9fe672d451c665a2cc45f609c9983d5308ca37fe5c3367d9926cce7d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7643 10148 bytes