Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c4f37918665793…

MALICIOUS

PDF

33.9 KB Created: 2020-08-22 07:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa08f302535ca4f2e7f70cf9fb584011 SHA-1: 77957679610942768553d9f1149c746d3f1bf806 SHA-256: 54c4f3791866579310cdd5f44bdfb50edc43d038fa27442b63d321c8d2f6ff37
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, 'https://ttraff.ru/pify?keyword=horn+blow+song+whatsapp+status+video', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute content or redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

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=horn+blow+song+whatsapp+status+video
    • http://badezomes.gracebaptistlockport.com/uploads/1/3/1/6/131636648/8672001.pdf
    • http://files.cardinalaviation.ca/uploads/1/3/0/9/130969659/munaxawozi-vepemaj.pdf
    • http://pavom.diyslimestudio.com/uploads/1/3/0/9/130969754/tavebijudogoxikozem.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/48909739527.pdf
    • https://cdn.shopify.com/s/files/1/0430/7851/6885/files/fomadonibulazozegetibe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/bmw_troubleshooting_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/nabitasetobudir.pdf
    • https://cdn.shopify.com/s/files/1/0434/1599/4529/files/43833407172.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/ginoka.pdf
    • https://cdn.shopify.com/s/files/1/0439/2982/9544/files/maternal_newborn_child_and_adolescent_health.pdf
    • https://cdn.shopify.com/s/files/1/0435/6279/5167/files/7588107274.pdf
    • https://cdn.shopify.com/s/files/1/0462/2739/0615/files/ropukenujefetor.pdf
    • https://cdn.shopify.com/s/files/1/0434/2913/4501/files/55984421820.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/fovuzuxuwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/22316743638.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0669/files/65438354625.pdf
    • https://cdn.shopify.com/s/files/1/0431/5738/9472/files/mewufes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7051/1521/files/spanish_to_english_basic_words.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_off00004884.bin
30d16caf9b551e680dac6fec73b8b2c5da9aebcfade5cb465c5f9db4c87993bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x4884 5472 bytes
font_01_sfnt_off00005b23.bin
67326e6ed71a9a80a6203ca10b8393f09587fdb8c02897a5f9a48211b1c38c66
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B23 9144 bytes