Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6a5e33c8191902…

MALICIOUS

PDF

46.7 KB Created: 2020-08-10 15:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 048026ec4b928f2d7e15b7fbff47ca1e SHA-1: e01dbb0a72b235aade893034e28402b57c5f9d2e SHA-256: 2c6a5e33c8191902413c7d01c41ff3166e0a8fb19ade35e47a5926f7ec8949a9
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL points to a redirector, and the document body contains numerous links to external PDFs hosted on various domains, suggesting a SEO poisoning or link farm attack. 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=diatonic+arpeggios+pdf
    • http://files.escapemachine.com/uploads/1/3/1/8/131871633/rowegowexu-wemepaza-zanimuzowop-jefut.pdf
    • http://files.llecllec.com/uploads/1/3/2/6/132682076/01c0795fee2a.pdf
    • http://files.sharingourjourney.com/uploads/1/3/2/6/132681836/4859272.pdf
    • http://files.domchacon.com/uploads/1/3/1/3/131383982/16034fde99a.pdf
    • http://nunuwew.samahanfilamheritage.org/uploads/1/3/1/4/131407089/newexibot-tazoroza.pdf
    • https://cdn.shopify.com/s/files/1/0432/3406/6594/files/73566319521.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/lolixeselibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/amphioxus_characteristics.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/1702133001.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/xutobibakadaverimaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/3577275934.pdf
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/occupational_safety_and_health_standards_as_amended_dole_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2315/files/13472829673.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/78459560822.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/mr_heater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/25402760761.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b96.bin
29dc19a9e07b58549fedfb8cf3b3a3e87cb78cf14dd37a9f934e51ae528ecfba
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B96 5292 bytes
font_01_sfnt_off00007d97.bin
4fd8e84eed6b1f46b71c08ca94f3bd999c71f4bb10ba56db7403e286ee3ac98d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D97 3020 bytes
font_02_sfnt_off000089d2.bin
4193c7960f1d010cbefa5a15cd8d5b7f4d851711ce5c169a5953cfc3e7f8068e
pdf-font-stream PDF embedded font (sfnt) at offset 0x89D2 10476 bytes