Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ac2d05349fcb45…

MALICIOUS

PDF

41.7 KB Created: 2020-08-12 02:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9deb8643a48a24c51c505e7280b7cf5e SHA-1: 5e9dc1cba6cd3c819db685b357957586511ac6b7 SHA-256: b2ac2d05349fcb45f9274ac9ef3915890c8d78fac5bc287a8a1889e3be06e0fb
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. 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.cc/wb?keyword=importancia%20de%20la%20administracion%20publica%20en%20guatemala%20pdf
    • http://panenapa.lisabaudry.com/uploads/1/3/0/9/130969724/nizevomidarinoloma.pdf
    • http://files.gistrummers.com/uploads/1/3/0/8/130874305/56fa3e71ce.pdf
    • http://files.fsk-midpen.com/uploads/1/3/1/0/131070895/sorebuvav-lafazaderip-polozudano.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/376979576.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/el_cine_documental.pdf
    • https://cdn.shopify.com/s/files/1/0435/4388/8023/files/madakexegejulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/sefiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/4646/1855/files/al_quran_karim.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/75905384816.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/jixosiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9144/3364/files/nukapexijenutufadotaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/92991378279.pdf
    • https://cdn.shopify.com/s/files/1/0435/2914/2426/files/47328073351.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/marale.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gegexovikorojirokelaxedu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7204/4697/files/30643150083.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_off000061e2.bin
ce9dd359fea88ef781e7437aa664ebf68aa40c7cfcc25b818b1dc376cde217f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E2 5552 bytes
font_01_sfnt_off0000748f.bin
027cf151b806c8071e0b03b2b39f54f8c5051d2f8b491b5c1c84ab7c0551095c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748F 10676 bytes

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