Malicious PDF — malware analysis report

Static analysis result for SHA-256 624442a8cc1bf90b…

MALICIOUS

PDF

164.9 KB Created: 2020-07-31 04:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 556b2b954ce42d4d42f963dd7e43fc9c SHA-1: a37fa29b6646a7d990d883d1d7be8e61a5414e88 SHA-256: 624442a8cc1bf90b92babfd1289a9d83bd848c46dc3dca952e3b437f4e3bbb8f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is a malicious redirector and uses an advance-fee scam lure, suggesting it aims to trick users into visiting a malicious URL. The primary malicious URL identified is ttraff.ru, which is known for redirecting to scam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=baixar+pdf+free
    • http://files.saintpatrickwapella.org/uploads/1/3/2/3/132302787/jazulidoxu-xojiwuvinufuzim.pdf
    • http://files.rekindledorganizing.com/uploads/1/3/1/3/131378993/41d6eaf.pdf
    • http://files.sustainabletourismreport.com/uploads/1/3/1/4/131406173/8243914.pdf
    • http://files.musicunderquarantine.com/uploads/1/3/2/6/132683140/denenepite-memogi-jasit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/62516440979.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/2462151974.pdf
    • https://cdn.shopify.com/s/files/1/0429/4685/5078/files/xiwuwatebilekovogoviz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/subaxarijeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/mujefulomil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/juwarilebapoxonudevizono.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/82384624265.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/31126548345.pdf
    • https://cdn.shopify.com/s/files/1/0437/6241/7825/files/fodujame.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0735/files/xixajazasemapijota.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/wowemesevolunuwa.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_off000253e5.bin
50c7f726131a8f9caea5afcc7cca4e51c97e5afad4d1887bde2e06f9aa40e761
pdf-font-stream PDF embedded font (sfnt) at offset 0x253E5 4432 bytes
font_01_sfnt_off00026300.bin
b7f2b0f18fb90ddea577f043571fc48f01d80f8e7fda78a9662d36aab9215dac
pdf-font-stream PDF embedded font (sfnt) at offset 0x26300 10588 bytes