Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f023f0368156ac3…

MALICIOUS

PDF

39.5 KB Created: 2020-08-29 19:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2472e844de9152fa97e690ccb1e874d7 SHA-1: c3f93413170042ac89b099d0990a969da4622943 SHA-256: 1f023f0368156ac34e56221f4b9baef1a116ecf457dc2026f8458ef3929efa6c
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/wix?keyword=how+did+the+rev+die'. This suggests the document is part of a link farm or SEO poisoning campaign, aiming to lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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=how+did+the+rev+die
    • https://cdn.shopify.com/s/files/1/0447/4336/0663/files/adobe_acrobat_pro_extended_to_word.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/89476403625.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetelonum.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/class_11_chemistry_hydrocarbons_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/7832/7203/files/72966022671.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a487ad2d96e4df2949d3a1a9a78f803.pdf
    • https://static.usrfiles.com/ugd/b8c837_3423be792ee54b759835f1d68b388df1.pdf
    • https://static.usrfiles.com/ugd/b8c837_31b9de4785a74f6d8c7e70ad1ce593df.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab181c78135d41809a4d3d37dd25602a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2b96ae9efea49cda02753a74a29d5b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a55c3657c1c346ceb08a8fe36e0100b7.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_off00005f34.bin
f0ac97b7eb1ab6e5738dc435d95e0412411222ac20ee891196c8592ec87b5cb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F34 4604 bytes
font_01_sfnt_off00006eeb.bin
df11e29532058cd1f888de63e850b65a879965a0144deffd21e60b61cc9bf073
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEB 10096 bytes