Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27a62224c0a9b44…

MALICIOUS

PDF

46.5 KB Created: 2020-08-03 11:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98b35d1aa2c42f16266340fdd6df1ed1 SHA-1: c2c77e711989d528dc611d26964b64d500c3d25a SHA-256: b27a62224c0a9b449e050b53e74cb32777e847bcb54d0aa418e5fd7a0ce41656
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Pdf to word converter free software offline' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a deliberate attempt to distribute malicious content.

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=pdf+to+word+converter+free+software+offline
    • http://files.vibrationalcleaning.com/uploads/1/3/0/9/130969917/d48752f5587c6.pdf
    • http://files.theduchessdates.com/uploads/1/3/1/8/131856347/a4a50197.pdf
    • http://files.duhamelsomerville.org/uploads/1/3/0/8/130813095/5435361b.pdf
    • http://files.ruralhealthrocks.com/uploads/1/3/0/7/130776031/panim-pomepovoruf.pdf
    • http://files.lolswampfest.com/uploads/1/3/1/8/131871605/fibibewulavafeb-lotenoxal-simolipomu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2129/3974/files/91882090364.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/webeluv.pdf
    • https://cdn.shopify.com/s/files/1/0428/1758/5308/files/bupazexubirulezuzikusisa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/widil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/61055335366.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/18017646990.pdf
    • https://cdn.shopify.com/s/files/1/0431/6974/2999/files/juwudowarino.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/juturabuwagavezojojafelu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/fewemujubufifuxoritimem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/change_host_files.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/46791488195.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_off000077d4.bin
b6300c9409c5cdbcce60578eac50997a6dbb0cac4a58a13c8c45cfaecfb85e56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D4 5168 bytes
font_01_sfnt_off00008992.bin
25c419bacbcd3914c2090a6965d359128ea359c0d38022dc6681883608bb3ce9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8992 10372 bytes

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