Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c20d222349db5e8…

MALICIOUS

PDF

48.5 KB Created: 2020-08-06 14:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9bbdb25e0898c3ddcfe68b2026df2f0 SHA-1: ec34c345e1ab93deb76e4c2999bfa25cf038be21 SHA-256: 3c20d222349db5e8ede82e91e1af53209e522331402e4b664a26b346c8207b7a
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content through a seemingly benign platform. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of the file. The primary malicious IOC is the redirector URL.

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=position+velocity+acceleration+calculus+pdf
    • http://files.ny6thinktank.org/uploads/1/3/1/4/131437862/rufafanodedajifuv.pdf
    • http://files.dorabramden.com/uploads/1/3/1/3/131382141/3729828.pdf
    • http://files.edgeservicesllc.com/uploads/1/3/2/7/132712072/4935833.pdf
    • https://cdn.shopify.com/s/files/1/0431/0731/9974/files/49379550322.pdf
    • https://cdn.shopify.com/s/files/1/0440/6145/8597/files/vobujurev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/92-_95_honda_civic_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/0815/4008/files/fupimugalap.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/25967918045.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/beehemoth_armor_rotmg.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/46486517756.pdf
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/lukatoxipeli.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/suguronoweta.pdf
    • https://cdn.shopify.com/s/files/1/0434/0557/4309/files/44816240118.pdf
    • https://cdn.shopify.com/s/files/1/0433/7310/1214/files/kaxexelojabatogajazomu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/67030429418.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_off00005f26.bin
85f4e3f9a8fcccd3f5bd6ecec9f1a36bbb9480656aa14cf69d779c56f6636009
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F26 5312 bytes
font_01_sfnt_off0000715a.bin
017d030e74e145bf5cacc9526723d6c5c14b010ef8b384f7e92734e8c4c6e24a
pdf-font-stream PDF embedded font (sfnt) at offset 0x715A 14216 bytes
font_02_sfnt_off00009f43.bin
631dc26ad7bdfa5e8cdc1148c9ce12690d87b9152a49d16962aea82f10c714c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F43 16248 bytes