Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e65f179b8e3f354…

MALICIOUS

PDF

62.1 KB Created: 2020-08-18 20:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32f2f810b8168a537a92fcf3e3d31b2a SHA-1: f98c5141165d9cbdfdcc503a61ad9d156e9062a1 SHA-256: 9e65f179b8e3f354797aba1ed8ab27692df6e78802bf4e56e5fd08e9bcbb1b7b
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure for a game download, aligning with the malicious link's keyword. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed for SEO manipulation to distribute malware.

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.cc/pify?keyword=hitman+blood+money++pc+windows+7
    • http://files.heauxmade.com/uploads/1/3/1/4/131407135/2081700.pdf
    • http://files.blackltdradio.com/uploads/1/3/2/7/132740637/dexodovepeze.pdf
    • http://jesinalez.losangeleswomenstheatreproject.org/uploads/1/3/1/4/131438541/7086389.pdf
    • http://files.balanceandneurologic.com/uploads/1/3/0/7/130738779/bc4729.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/2127088977.pdf
    • https://cdn.shopify.com/s/files/1/0447/4057/5386/files/writing_algebraic_expressions_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/bajaj_ceiling_fan_price_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87664315042.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9880/files/tonapexopopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8738/1155/files/bezatab.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/warranty_deed_form_new_york.pdf
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/moropesexunipudapowejifin.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/73706070757.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_off0000b573.bin
dc8772fc2602e09486c7c5c9c7886342e7d16d496e00edeb557c73fde4744bff
pdf-font-stream PDF embedded font (sfnt) at offset 0xB573 5496 bytes
font_01_sfnt_off0000c820.bin
2b0cbfa88d16be32d68f9a19a5944cb1b6a020dbdcbb11017d1880a4eefcf906
pdf-font-stream PDF embedded font (sfnt) at offset 0xC820 10400 bytes