Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f19c10fc90b026…

MALICIOUS

PDF

53.7 KB Created: 2020-08-17 14:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00178013e8b594525029685ee53bd1c1 SHA-1: 2e48a287366971d91a91034c7e17562d32972a2f SHA-256: e4f19c10fc90b026c33401b49d96ea3a37969a480b9dd1e73ca4854b4fe1874a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, ttraff.ru, is identified as a malicious redirector. The document body, though heavily obfuscated, contains the phrase 'Best website to marathi movies free' and the malicious URL, suggesting a lure to trick users into clicking on the embedded links. The ML classifier also strongly flagged this PDF as malicious.

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=best+website+to++marathi+movies+free
    • http://files.deliveranceforchristians.com/uploads/1/3/0/8/130873718/lojiv.pdf
    • http://files.donnajoywest.com/uploads/1/3/1/8/131856186/tolutadudumi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/faxonusuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/21466590214.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/58438298355.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/naravozatogodunufisod.pdf
    • https://cdn.shopify.com/s/files/1/0438/7920/2984/files/2028359029.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/kufokikudebo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4864/8354/files/80956952041.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/celery_juice_medical_medium.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/ruteroben.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/23267014051.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/modern_arboriculture.pdf
    • https://cdn.shopify.com/s/files/1/0435/6790/6977/files/78942254548.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/sozetodilubufunadiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/43778875991.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_off00007e6b.bin
9e79bd082c8efeb6a19ae351d4cbd3531d5f1dcd873d9c8be732e945c5149598
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6B 5316 bytes
font_01_sfnt_off00009075.bin
3e3088600b175c065777659d65e5e9cfd61dfc03a5105359f76d35db64ffae36
pdf-font-stream PDF embedded font (sfnt) at offset 0x9075 10344 bytes
font_02_sfnt_off0000b42a.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB42A 16164 bytes