Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9cbd389c48a4f33…

MALICIOUS

PDF

56.7 KB Created: 2020-08-14 08:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c0e7e138ff8447fcdf3f03b0ac8d4aa SHA-1: dfb2517c20b7ea4cbb11bafdd457ccdada90a639 SHA-256: c9cbd389c48a4f33da902e2665b1b05739f63fe2d505eaa2e5a85c73c52db843
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=cable+tv+guide'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are generated for SEO purposes. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the lure text 'Cable tv guide' and the malicious URL, reinforcing the social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=cable+tv+guide
    • http://files.nasiiclothingstore.com/uploads/1/3/1/8/131856852/zowutiwef-wiluz-bifuwuzafojiwoz-rerabigo.pdf
    • http://files.stillskiapparel.com/uploads/1/3/0/8/130873718/2441f2ee16.pdf
    • http://tedemet.centraliabbc.org/uploads/1/3/0/7/130776873/moputomeke_neberufivovopim.pdf
    • http://files.quarterrestbon-bonsenterprises.com/uploads/1/3/0/8/130813837/2461b9c9d.pdf
    • http://files.schnibblesandsuch.net/uploads/1/3/1/1/131164231/dijepolus.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/nbte_curriculum_for_hnd_business_administration.pdf
    • https://cdn.shopify.com/s/files/1/0432/1630/6344/files/the_oxford_handbook_of_child_psychological_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0436/4002/9344/files/sabavawesadolezaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3448/files/hepatomegaly_differential_diagnosis.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/66665964735.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/19791730427.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1630/files/63452375953.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/rusimajagof.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0135/files/digumozadizowuxiwetapi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/93336492477.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/gimusatotizigovatetif.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_off0000a1b3.bin
bf72d7fbde9e55a974a685aa565c4b90c55f3de9ec9bdbe7f23414f1ff0ff84b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B3 4824 bytes
font_01_sfnt_off0000b237.bin
e37af1b3ea4e408b93988d5cd6f0c4e193eb93fb3790ff9bbf7daf14fe9fc0dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xB237 10388 bytes