Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d98810f35b19e48…

MALICIOUS

PDF

43.6 KB Created: 2020-08-18 14:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeba611991511e4b54a68f85d63809d1 SHA-1: 999710007690541cc832e5dcba8c4b2236a47033 SHA-256: 4d98810f35b19e484f30ed825cb27d8a230e9705b36acdf3d108d9a083a2f643
150 Risk Score

Malware Insights

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

The PDF contains a deceptive document body and a large number of embedded links, many of which point to Shopify-hosted PDFs. One critical heuristic indicates the primary link leads to known malicious redirector infrastructure. The ML classifier strongly supports a malicious verdict. No scripts were extracted, but the link farm and redirector suggest a phishing or content-luring attack.

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.com/pify?keyword=capacitor+ceramico+103+datasheet
    • http://files.pucherosoundmachine.com/uploads/1/3/0/7/130776141/9036480.pdf
    • http://files.mrowslater.com/uploads/1/3/1/6/131606789/8986185.pdf
    • http://files.ipksportsbetting.com/uploads/1/3/0/8/130813325/vexitijupogobevuwura.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/maxupeseviv.pdf
    • https://cdn.shopify.com/s/files/1/0439/1917/9944/files/boris_cyrulnik_libros.pdf
    • https://cdn.shopify.com/s/files/1/0438/5813/3152/files/51656356499.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/rirumiluteropugarude.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/24706794067.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7525/files/plague_inc_evolved_necroa_virus_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/54547920903.pdf
    • https://cdn.shopify.com/s/files/1/0438/9961/7448/files/ropusoloxawijozovosuxapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/34592824220.pdf
    • https://cdn.shopify.com/s/files/1/0432/3504/9640/files/blouse_cutting_and_stitching_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/74039562291.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_off00006631.bin
dba00f0f4c754787520cba4d179052139d30bb785b4f46c82d27400f682e6671		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6631 5544 bytes
font_01_sfnt_off000078e1.bin
c607c048c7289476bfa2d94cb0ddd434030c160c9cc68db6619e5c57c24724b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E1 12704 bytes

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