Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9705d7c558460ee…

MALICIOUS

PDF

56.2 KB Created: 2020-07-27 01:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5b180e234c5fb417308d61331838319 SHA-1: a02955ec6d991a0a201e43f37f05edebcf573ef7 SHA-256: f9705d7c558460eef1e45c3cddc82e2c1300998959b2b900bc08b084379e3193
152 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to malicious content, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cisco+unified+communications+manager+express+ordering+guide. The document body, though heavily obfuscated, appears to be a lure related to a Cisco ordering guide.

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/pify?keyword=cisco+unified+communications+manager+express+ordering+guide
    • http://files.gratefulnotdead.com/uploads/1/3/1/6/131636988/3096871.pdf
    • http://files.bcild.org/uploads/1/3/1/8/131859993/691177.pdf
    • http://files.annaschildcareyoga.com/uploads/1/3/1/4/131405977/gozuponoworem-relupuwegitifaw-sedix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tuwupijisunuxavupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4142/files/lusaxamepu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/24220206700.pdf
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/35522051159.pdf
    • https://cdn.shopify.com/s/files/1/0434/5187/5481/files/17179823481.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/finaledupe.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/71389743076.pdf
    • https://cdn.shopify.com/s/files/1/0439/3802/1544/files/91089798181.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/50451388103.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/27925473959.pdf
    • https://cdn.shopify.com/s/files/1/0428/4029/3543/files/31524428887.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_off000097e0.bin
0469c0eaa344729e70eb0dc10a1d878f46860d18dcc7bc81f29f7202d55bb7a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x97E0 5416 bytes
font_01_sfnt_off0000aa34.bin
44df5dacccf79a5e5a1f90fced04e5baebc90c04843b52e35143480e5803afcb
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA34 11804 bytes