Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f2de4f7576f1ed…

MALICIOUS

PDF

33.6 KB Created: 2020-08-19 13:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33ebefa1d6e9f03f70f421bec88994d2 SHA-1: cea84286220961863eaf9c628949b047e845a148 SHA-256: 82f2de4f7576f1ed1ece1742cc24abfe2ef46329ba191d372d5f8080a61a8b47
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the attack 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.com/pify?keyword=bordered+paper+pdf
    • http://nosuf.graceellann.com/uploads/1/3/2/7/132740505/dorinelaxa.pdf
    • http://files.sciencebrewer.org/uploads/1/3/1/4/131437149/wugesuzazeko_xaxasojitoveb.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/aerodactyl_raid_boss_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5181/8903/files/vinatimiliwisefumozuva.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/44339252976.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/patagufapuji.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/dajagujuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/resident_package_log_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/jojizotazemugazosesawop.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/93456266155.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/swot_analysis_of_self_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/84512813801.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046ec.bin
dae5293b60efc29b4fcadba57f875cb8e31d99c0f4a6ab2516866ea390573b2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x46EC 4872 bytes
font_01_sfnt_off00005793.bin
7cba71fcf08b9f353ba8049c2a8dd9c1ebce2590be20ab22cf2d0d69b9fc4e26
pdf-font-stream PDF embedded font (sfnt) at offset 0x5793 10044 bytes