Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c239ba13dab8c63…

MALICIOUS

PDF

43.1 KB Created: 2020-08-04 13:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b15f43be8c92265cd338d6331d373c34 SHA-1: f26a22dac6c6414051310f970962c296fa1d5b83 SHA-256: 2c239ba13dab8c63f7d769cd5af59c7bd3096e0013ed1755992a57f47cf29d21
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector infrastructure at `ttraff.ru`. The document body, though heavily obfuscated, contains references to the redirector URL and other Shopify-hosted PDF links, indicating a lure to download further content. No scripts were extracted from this sample.

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=bleeding+and+coagulation+disorders+pdf
    • http://files.18holesforacause.com/uploads/1/3/1/0/131070597/firege-suludekozoxaxep-gomev.pdf
    • http://files.holistichealingspa.com/uploads/1/3/1/3/131379040/lipupimuru.pdf
    • http://files.rootandbranchtrees.com/uploads/1/3/0/7/130738764/8862281.pdf
    • http://files.missenglandsclass.com/uploads/1/3/1/4/131452902/354ee3971.pdf
    • http://files.computerscpr.com/uploads/1/3/2/7/132740860/xubujolodosetejokuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/53023950735.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/74090139958.pdf
    • https://cdn.shopify.com/s/files/1/0433/8542/1978/files/actuarial_mathematics_bowers_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/xusiwokelexogi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/vevodotelawexosibeniduje.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/toxoplasmosis_cerebral.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3715/files/texas_driver_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4789/4692/files/carillas_de_resina_paso_a_paso.pdf
    • https://cdn.shopify.com/s/files/1/0433/8070/3399/files/futujupexufirija.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/migoxanegetotar.pdf
    • https://cdn.shopify.com/s/files/1/0429/0392/8991/files/an_introduction_to_biostatistics_thomas_glover.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/71913132579.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/vekufe.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_off000068da.bin
3325c455534c16332cb85d9b8e3cd8427bc630a4b83e75d6c396f060a66229da
pdf-font-stream PDF embedded font (sfnt) at offset 0x68DA 5372 bytes
font_01_sfnt_off00007b32.bin
d607c8e055eecc947263bb1ead5afe08685cbb9b28b68920f507eecceb998acb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B32 10524 bytes