Malicious PDF — malware analysis report

Static analysis result for SHA-256 b649bf12cb774d81…

MALICIOUS

PDF

57.1 KB Created: 2020-08-05 03:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae1d6974991ecb167151a8854bd91d36 SHA-1: 9e27e7c25b3eb71c85d233f3d6937ef8043e3772 SHA-256: b649bf12cb774d814ebd99138d6d7619dcb7aa83b148d377e769b42c1e26cf85
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=burgess+shale+fauna+pdf'. This indicates the document's primary purpose is to redirect the user to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. 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.cc/pify?keyword=burgess+shale+fauna+pdf
    • http://dipemit.fullmoonyogabirth.org/uploads/1/3/1/4/131407227/1393658.pdf
    • http://files.prosewizard.com/uploads/1/3/0/7/130775221/dukivasibadupepowaz.pdf
    • http://zijezeg.johnlsheppard.com/uploads/1/3/1/3/131383613/futebafivufes.pdf
    • http://files.abitgraphic.com/uploads/1/3/0/7/130775537/5500649.pdf
    • https://cdn.shopify.com/s/files/1/0427/5837/3542/files/pijakut.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/folodivutab.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/24696528805.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/36280292215.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/nufalumosedodibazu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8986/1535/files/radakuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/bekojusabukuxokira.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/nezupadutafego.pdf
    • https://cdn.shopify.com/s/files/1/0429/4675/6774/files/63981438419.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/21193440615.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/23710102029.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6321/files/65117543645.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_off0000a18a.bin
d1c8ea092e88d5258455ba14a8fb0701dac34df5783f2f36a4e0fd83890cffba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA18A 5352 bytes
font_01_sfnt_off0000b3bf.bin
b2b1ed33be0ab4d9233cb9a31faa11cbc2b990d43fe59560a30ead75fe2ac337		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BF 10488 bytes

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