Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39d139da2393b35…

MALICIOUS

PDF

44.7 KB Created: 2020-08-03 15:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94b1e828cdd83c01a4c43bfb201a8a33 SHA-1: 20f1e557b41d440150065066b6b9bc54a7e4c546 SHA-256: c39d139da2393b359e2101a8e8c4122b361d33c027d0e6fdeee08378a2f7674b
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure related to academic materials, likely to trick users into visiting the malicious site. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, likely for SEO poisoning or distributing malicious links.

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.com/pify?keyword=princeton+review+sat+chemistry+practice+test+pdf
    • http://files.3rdpartyslabs.com/uploads/1/3/0/7/130739773/a7c65b8.pdf
    • http://files.sarasotacountysurplusproperties.com/uploads/1/3/0/7/130739263/pisesawaxupi_furaziguve.pdf
    • http://files.thehockeydennl.com/uploads/1/3/1/4/131407552/waveg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zadolodiwifunum.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/85115341319.pdf
    • https://cdn.shopify.com/s/files/1/0437/0009/3083/files/sogikogusojijinavovefogut.pdf
    • https://cdn.shopify.com/s/files/1/0440/6276/9302/files/xojakerufotom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negopolikutowuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/zamorovumifewuwotov.pdf
    • https://cdn.shopify.com/s/files/1/0431/4729/6924/files/poxewozifuweterodewele.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/siriwajobem.pdf
    • https://cdn.shopify.com/s/files/1/0428/0067/7031/files/47774751741.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/55185334320.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/fibirir.pdf
    • https://cdn.shopify.com/s/files/1/0429/5668/5468/files/kexurepobavunujaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/4135/6950/files/dutonew.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_off00006d41.bin
ee03989d95270411727c67300e9fbce936796ad52483db73730d9698955c4d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D41 5620 bytes
font_01_sfnt_off0000804c.bin
a99ed3038943c6455d202fafbfef046d2b785d2b9e4c9d9b4126c49fc85ec558		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804C 11008 bytes

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