Malicious PDF — malware analysis report

Static analysis result for SHA-256 0027c441a268dbbb…

MALICIOUS

PDF

53.9 KB Created: 2020-08-08 00:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7442d9ce88ecc158b3cf73479d681e36 SHA-1: b5ab1c9ebcfe729190527ab8836ee83081dd8991 SHA-256: 0027c441a268dbbb67fcb4d54424962903a5c43f1f89f9de00afb899a30345dc
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to further malicious content. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to distribute harmful content. The document body itself appears to be obfuscated or corrupted, but the embedded URL is clear.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=administrative+procedure+act+pdf
    • http://files.canningcomputerrepairs.com.au/uploads/1/3/2/6/132695719/penutoxanego_biwipu_zafumipojukevem_vililipegul.pdf
    • http://files.gonzalesmastergardeners.org/uploads/1/3/1/4/131437702/disufisewugaza-wokunidutileb.pdf
    • http://menugugex.psweloveu.com/uploads/1/3/1/8/131856772/346a46f4ee8.pdf
    • http://files.riverruncarshow.net/uploads/1/3/0/9/130969887/55522fd5d.pdf
    • http://files.laurasaye.com/uploads/1/3/1/3/131383318/220509.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/1789125816.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/97394059970.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/34430039814.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/19198631587.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/dimunanebeseperawoni.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8359/files/cissp_cbk_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/4237/3785/files/69081864698.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/mivefojuladafubazomom.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/wigunesenudanivonij.pdf
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/multivariate_analysis_in_community_ecology.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/mofanoxanu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000952d.bin
abba89dd4f059183edd1368fe3b90a42cea431590192dfccbd1518bdc488aab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x952D 5316 bytes
font_01_sfnt_off0000a731.bin
4069969f441621d68cf80aa22e3b5fff2a099e14a9555300ce131b09155fe156		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA731 10248 bytes

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