Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c02aceacc1b8a5…

MALICIOUS

PDF

47.8 KB Created: 2020-09-02 23:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a14674b7096cde6200be482648a3759 SHA-1: 74596e628c1647fb432873cd2b159995e4eb377c SHA-256: 89c02aceacc1b8a512712aea725a89407f93e8cf7d8eeae7ef572e1e0712137d
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious and contains a significant number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.link/wix?keyword=achilles+glared+at+him+and+answered, which is likely used to funnel victims to further malicious content. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's a lure document designed to host malicious links.

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.link/wix?keyword=achilles+glared+at+him+and+answered
    • https://static.usrfiles.com/ugd/b8c837_374079b2775b4614b91333ce9e794495.pdf
    • https://static.usrfiles.com/ugd/6290de_883bebd33ea14378833ffc8770f24d7b.pdf
    • https://static.usrfiles.com/ugd/7c3584_339e19fa69f94f60a808ec75ef56a903.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9f61959076245ed9fa00c96a6d56967.pdf
    • https://static.usrfiles.com/ugd/99b222_6ef7da0c07c941eb9c3fdc7d4cb4979a.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_c30ed9847c46474d9c7b57c4229f7997.pdf
    • https://static.usrfiles.com/ugd/f1780b_c707b779213246f0b8356c3bbff89977.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab181c78135d41809a4d3d37dd25602a.pdf
    • https://static.usrfiles.com/ugd/41f880_177b2ebbb8ce4eea8af94c0bbc3cba73.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/ranifomusesojozon.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6807/files/belati.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/18486886150.pdf
    • https://cdn.shopify.com/s/files/1/0430/3604/9571/files/autocad_mep_2018_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/koboxafu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/isomerism_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/93194223554.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_off00007ce6.bin
4a282f39a640f5fc1d75a6c2d1508a3ca0abe1a6b315aa14ed298df912939307
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE6 5436 bytes
font_01_sfnt_off00008f43.bin
8faa6d8c2a8d4c8c5f93c227fda17d7bbb82abcd27857b1077772df5f82829db
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F43 10144 bytes