Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce746199c91b6a99…

MALICIOUS

PDF

41.7 KB Created: 2020-07-09 12:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afb90de90f4b478e01623dd7f9e4e7e7 SHA-1: 33c05e532c5d6d13a2b5f370ac18024f3c0e99de SHA-256: ce746199c91b6a9933275bfb6f8202ba06a8fae8eea42c783525de23c43eaad8
150 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to known malicious redirector infrastructure or link farms. The primary URL, 'https://ttraff.ru/pify?keyword=sociolinguistics+book+by+hudson+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'sociolinguistics book by hudson pdf', suggesting a lure to trick users into downloading potentially harmful content disguised as academic material. The presence of a large number of external PDF links further indicates a link farm strategy, likely for SEO manipulation or to distribute malware.

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=sociolinguistics+book+by+hudson+pdf
    • http://files.nimblehillbrewing.com/uploads/1/3/1/6/131606631/6214782.pdf
    • http://files.projectufo.org/uploads/1/3/0/7/130739381/4877757.pdf
    • http://files.dguchicago.com/uploads/1/3/0/7/130739174/3587020.pdf
    • http://files.nalinikrishnankutty.com/uploads/1/3/0/8/130874128/mewajuluxojuvafox.pdf
    • http://files.piasiagallery.com/uploads/1/3/0/8/130813965/bitij.pdf
    • http://files.troutbum.ca/uploads/1/3/2/7/132710655/046c6686a.pdf
    • http://files.healmylifemobile.com/uploads/1/3/0/9/130969993/7961412.pdf
    • http://files.thestrongfamiliescommission.com/uploads/1/3/1/8/131871909/votijaw_vemezuzatagokoz_tajolatogip_fudujed.pdf
    • http://files.stmarymagdalenewpg.org/uploads/1/3/1/8/131856531/badifa.pdf
    • https://cdn.shop
    • https://wodoloz.files.wordpress.com/2020/06/31335584712.pdf
    • https://kurasedi.files.wordpress.com/2020/06/75628856084.pdf
    • https://dimufasuxuku.files.wordpress.com/2020/07/62161784884.pdf
    • https://wemuvepilupu.files.wordpress.com/2020/07/kezojulenolexajilejixusiz.pdf
    • https://norofila.files.wordpress.com/2020/06/rubegu.pdf
    • https://popusupoje.files.wordpress.com/2020/07/jatavimugideluwarep.pdf
    • https://jafelasug.files.wordpress.com/2020/07/93739883808.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fasexerogetotano.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.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_off000064f6.bin
ec1e20ec368839439596f1f4b8358a2dfaf030ae34895f5418711ac576f32619		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F6 5284 bytes
font_01_sfnt_off000076e0.bin
80e5a9133e1fb496c3ebef2e1e05c9d761d8e0151b50d9ff9b3a80b061c57b8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E0 10080 bytes

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