Malicious PDF — malware analysis report

Static analysis result for SHA-256 577014c8df97dc6e…

MALICIOUS

PDF

54.3 KB Created: 2020-08-18 15:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9db2e32c03f2a935f37403deb91a3675 SHA-1: 8c2b5a5343798c2fd7115d9a6c52bd2064d22784 SHA-256: 577014c8df97dc6e4d564eb59aaa844007febefdc5ab610746bf969a22782831
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, with one identified as a malicious redirector. The presence of numerous links, many pointing to Shopify-hosted PDFs, suggests a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct payload delivery.

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=aerobic+vs+anaerobic+wastewater+treatment+pdf
    • http://files.simplysmartsys.com/uploads/1/3/2/7/132712306/e1a95404af.pdf
    • http://files.theshankers.com/uploads/1/3/0/8/130814157/31722983cb3.pdf
    • http://pixexi.eileenwalker.com/uploads/1/3/1/8/131856708/papete_wubojarakepana.pdf
    • https://cdn.shopify.com/s/files/1/0437/4567/3377/files/imovie_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/jobadetivodap.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/tafonufojifa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/authentic_leadership_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/43345587141.pdf
    • https://cdn.shopify.com/s/files/1/0454/3918/9142/files/imbuing_guide_ultima_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/voganenorusezefitawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87678197609.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/lavavewuzugimot.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_off0000972f.bin
74ee92a452bac75542ff7efadfb9d880a7760ff3af0a883aeac7ab8d3c7eceef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x972F 5548 bytes
font_01_sfnt_off0000aa04.bin
a727362003fe8e15dc9ca4c0e8af662f73e76e5a96773bdb982c777d74619876		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA04 10140 bytes

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