Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b08dc0ea7f0864…

MALICIOUS

PDF

38.1 KB Created: 2020-09-18 23:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 170fcbf513ce20dedb7d0aacad4899c3 SHA-1: 900f94bc8ab67de810ea2f9e541317df7ea38f00 SHA-256: 19b08dc0ea7f08641ae6bfc10a00bdd388f91a7e8e8b05ec69134c33833f5039
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains this URL and other links that appear to be part of a link farm, suggesting a phishing or scam attempt. The presence of a 'download button' heuristic further supports the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=two+step+equation+puzzle+worksheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/58140712972.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/kenagagexov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86187089948.pdf
    • https://43fff4b2-36d5-41b4-8c6f-6813acf6a21f.filesusr.com/ugd/60933b_dce223473a1e4a0e86cc1f509ecab4d2.pdf?index=true
    • https://f743f371-0d0c-4490-8d5c-ad81f0b3df5f.filesusr.com/ugd/b9801a_55edd29691f34d2982b8b976d8fe7410.pdf?index=true
    • https://584fe13d-9a07-4bb5-b337-3ac032953a7d.filesusr.com/ugd/de3d83_5475ade48ff24547ac29767d328bf43d.pdf?index=true
    • https://1a34f886-5871-4493-b622-4ef9da4d7ca8.filesusr.com/ugd/09273f_9fbce09559624b86a24ec69037d96c80.pdf?index=true
    • https://8d2b6723-1727-47e8-a2b7-9642eddc6064.filesusr.com/ugd/c34aa9_b3a9b6bd502d4f09a72377cdd5fefe2c.pdf?index=true
    • https://3e8c5a8d-0a3c-477b-b0ec-ec8d29e04bde.filesusr.com/ugd/4bdc6d_25524ac47f1d41e6b42ed8ccdab794cf.pdf?index=true
    • https://4ef969ed-268d-4aac-8d1f-714d7f441e66.filesusr.com/ugd/17ce20_e374aa68b9154d799535b1077876f4c3.pdf?index=true
    • https://605439d5-e221-43a1-8b31-de73beee6012.filesusr.com/ugd/dbbfd0_ff6b8dd7a78041b097d0c6d58c83f280.pdf?index=true
    • https://888f09a4-8d3f-4c83-a3f6-590b61d1cad0.filesusr.com/ugd/25c42e_fc063acd0a6b4d5cbf746ff44cb8488c.pdf?index=true
    • https://a5227961-a0db-4d47-8f06-74751bcef4b8.filesusr.com/ugd/ace02d_2974b9df56e344d6bedff3d8cd8f995d.pdf?index=true
    • https://bf8a0b12-5a2d-43a2-83eb-1bf42dd8c1e7.filesusr.com/ugd/592671_7172cc864288473e9198db6a5ecdbf15.pdf?index=true
    • https://d271f6b6-0ef0-44af-a0e2-39b93eb43a2a.filesusr.com/ugd/bb4607_094d184e381e499598d3bbab16d4dce4.pdf?index=true
    • 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_off000048cb.bin
c66a0a4d3fa75c1bdce0bd48ddeb1d0964fd2ca0bd473fb090dbcc49acfbcc70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48CB 5068 bytes
font_01_sfnt_off00005a16.bin
d39a484ae62e30545e47f55a84ce9416d6fec9d8a043eb22fe72c52bbe259a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A16 10372 bytes
font_02_sfnt_off00007d7e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7E 4324 bytes

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