Malicious PDF — malware analysis report

Static analysis result for SHA-256 f956420c7f31ac8c…

MALICIOUS

PDF

62.7 KB Created: 2020-08-21 22:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7f5b398f2590f45000453d733a40455 SHA-1: ca0b80d14ec9b0730395f019a742b987923fb1e7 SHA-256: f956420c7f31ac8c61e923ad5b1065ed50e68e725a3a2eacf7cce7b0b6b61c13
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a 'lost girl season 5 episode guide'. This indicates a likely phishing or malware distribution attempt. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO poisoning or to obscure the malicious redirector. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=lost+girl+season+5+episode+guide
    • http://surag.roanokecommunityco-op.org/uploads/1/3/1/3/131383309/02a9566f0757ce8.pdf
    • http://files.snowangelsiberians.com/uploads/1/3/1/4/131437276/5aadf27.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/81452674735.pdf
    • https://cdn.shopify.com/s/files/1/0447/8858/0512/files/rasitupulevobalogisavet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/vilimetilexakozap.pdf
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/built_to_last_james_c_collins.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/35675876874.pdf
    • https://cdn.shopify.com/s/files/1/0440/5847/6694/files/nadi_astrology_books_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0677/8784/files/87719430519.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7476/files/47606280059.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6600/files/apprendre_l_arabe_pour_debutant.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_off0000af75.bin
c129155ae646e29fbcc0a0f493c0a3ff8fc9264aa0d7e7d727bd1c9da3a0d8ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF75 5192 bytes
font_01_sfnt_off0000c128.bin
d558c7a6d38693e2ba66d33befcb8ce9c2d40d76078acc24b10512f097457b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC128 13860 bytes

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