Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8607708e5a12699…

MALICIOUS

PDF

41.3 KB Created: 2020-08-28 11:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0a1ef01cacb346efc092e4f660b6c2f SHA-1: 8c8bacff30df17295e3e2fb9232ab983186b3665 SHA-256: d8607708e5a126992ec067e04e91d8d6cec5010542cf70f38e9feb20e058e3f9
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, indicating the document's primary purpose is to lure users to a harmful site. The PDF_SEO_LINK_FARM heuristic suggests a large number of links were generated, likely for SEO manipulation or to obscure the malicious destination. 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=si+hubiera+estado+alli+acordes
    • http://pefan.cricstudios.com/uploads/1/3/2/8/132815367/ed9fddb2764.pdf
    • https://cdn.shopify.com/s/files/1/0437/5481/5640/files/paxamizuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7095/5415/files/26620248535.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/62487370567.pdf
    • https://cdn.shopify.com/s/files/1/0447/1911/2345/files/round_above_ground_pool_deck_plans.pdf
    • https://cdn.shopify.com/s/files/1/0435/7845/8275/files/4868592787.pdf
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/zoruxakobirixenukuvopojeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/luxin.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/70487485257.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7519/files/velabosalewugirabozi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/nerubozixatuledeziwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8003629611.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_off000057d7.bin
d04c45b4736c49180911b8681683868eaf780b14a2c6e05bd99dfe9135c3d12d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D7 5272 bytes
font_01_sfnt_off000069a2.bin
395ef668fa7a262a43829d6f05682aeb61b806614c28501842ec7f6585a520cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A2 14720 bytes

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