Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c601cd3ddbc6bf…

MALICIOUS

PDF

46.0 KB Created: 2020-08-20 07:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a84a31b4d5394d4e9e5c9aaa500cbeaf SHA-1: ab3d87232faa58fbdde18e9244df115bc0c1a88e SHA-256: b2c601cd3ddbc6bfd576408bcd3c23d331dd8a2957d1b89007440468f7d8b49c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm designed for SEO manipulation or to obscure malicious destinations. One critical heuristic identified a direct link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=deduction+guide+cannot+be+defined'. The document body itself is largely unreadable but contains this URL, reinforcing its role as a lure. The ML classifier strongly supports the malicious nature of this PDF.

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=deduction+guide+cannot+be+defined
    • http://luzapuwu.taverhamdaycentre.org.uk/uploads/1/3/2/8/132814930/novuw.pdf
    • http://files.sthrouda.com/uploads/1/3/0/7/130740062/3242153.pdf
    • http://files.nextprepkids.com/uploads/1/3/1/3/131379262/9011426.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/gatixenomeniwogakoxudok.pdf
    • https://cdn.shopify.com/s/files/1/0430/9408/1687/files/fosigel.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/87829496166.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pifafesilepobusofamut.pdf
    • https://cdn.shopify.com/s/files/1/0429/3338/7423/files/25227853485.pdf
    • https://cdn.shopify.com/s/files/1/0437/7231/3751/files/3494060555.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/academic_essay_samples.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7781/files/fikutokumo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/52531150552.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/42362670741.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5829/files/nawonavubezojezamujive.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/wagujidojupesi.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_off00006cc7.bin
1735493194240a75841ea7e30a7c36a6d70ceb6c70575a79b27c65fd96adeaf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC7 5024 bytes
font_01_sfnt_off00007df3.bin
04046361469ec3c9924d4b39bc396d748c8778a2ba2d1952d6ba387daf50273f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF3 14264 bytes

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