Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2af5f222b023ef5…

MALICIOUS

PDF

42.6 KB Created: 2020-08-31 12:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25b67b3713de1714a965a1ab43abb32f SHA-1: f66fd45d6d1e55decf74b66df5c2ff688ae72701 SHA-256: c2af5f222b023ef509b62fa8dc5abcebe148e6f22720c5822afb70542af8569b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely used to lead users to a malicious site. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to a manual. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm, suggesting a phishing or scam attempt.

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=armitron+45%252F+7042+manual
    • https://static.usrfiles.com/ugd/6df952_1b6cea2304d64fc59a22c64803b89ef5.pdf
    • https://static.usrfiles.com/ugd/de3d83_3c2c170219764e2cb6428593156e2df7.pdf
    • https://static.usrfiles.com/ugd/6f58fb_c3f4ab2b1f9c4ad5998bc0eec8f2ceca.pdf
    • https://static.usrfiles.com/ugd/278743_aa8b70ce98184b56a9b0d88c6ff2f35e.pdf
    • https://static.usrfiles.com/ugd/e2f197_3bebd5abe1a147ab8c4bfbb40f0d80f7.pdf
    • https://cdn.shopify.com/s/files/1/0443/8245/3926/files/mathematical_economics_and_econometrics.pdf
    • https://static.usrfiles.com/ugd/430cb2_bb3084b944e44512837a9fbce29a197b.pdf
    • https://static.usrfiles.com/ugd/21e6f2_00219010bd384ec58cad6e950e101979.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/8116842111.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/barawapisokutufewaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/berserk_manga_mega.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/5990/files/how_capitalism_works.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/principles_of_marketing_clep_study_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a42.bin
ec4bfb2dfd59cd9697fff93168fb7c301d70486a4389db4a4016cb682e2a1845
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A42 5008 bytes
font_01_sfnt_off00006b30.bin
9b959b391205ab056f0d5a02833cb137ea52b9ddbba44ac4a88d880620c725a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B30 10668 bytes
font_02_sfnt_off00008fb4.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB4 4324 bytes