Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79addac3f9cf7f2…

MALICIOUS

PDF

56.0 KB Created: 2020-08-04 04:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae0a150625139e83644b41d1fef39d0b SHA-1: a21a4d052e6683cf5df0d5e93d0f156c5a0e8052 SHA-256: f79addac3f9cf7f29bb20b549701a958282617c158ea99cd8e3370d0aa8a76a6
150 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many of which are hosted on Shopify. One prominent link, 'https://ttraff.ru/pify?keyword=accelerated+learning+crash+course+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure the user into clicking the malicious link. 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=accelerated+learning+crash+course+pdf
    • http://pisod.vanastracommunitycrc.org/uploads/1/3/1/0/131071243/fedasen_surafupopa_rutudazukit.pdf
    • http://files.transformedforlifeuganda.com/uploads/1/3/1/3/131384335/68ed566ff6.pdf
    • http://files.jordanjclark.com/uploads/1/3/1/4/131407424/fezidov.pdf
    • http://files.partscare.aero/uploads/1/3/0/9/130969498/zizig.pdf
    • https://cdn.shopify.com/s/files/1/0428/7466/7164/files/kafeti.pdf
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/60039921804.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/1514989299.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7529/files/ruwamaxexepan.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/bupijuguw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3823/6062/files/pdf_max_pro.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/demon_slayer_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0440/6748/7894/files/paxufezusagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/fowufira.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/juzevetimisaz.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_off00009f6b.bin
f662e61795276031c8788008e4535846d9399a7a2bcec18df630293bd7a5ab6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F6B 5408 bytes
font_01_sfnt_off0000b1ca.bin
5f561b33dfc5330b0cf8b9b04417ff4bdf0e0165a44a7e33d730bd91938aa74f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1CA 9724 bytes

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