Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c38e67dc9f9ee50…

MALICIOUS

PDF

302.5 KB Created: 2020-08-17 15:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 038e6d46146b7992b74454ed1980bcff SHA-1: aa70aae3896d51a0552981ada97a90afbf1ca969 SHA-256: 7c38e67dc9f9ee503601298390f77bff21d708fd05989449bd3c1e0873596bb3
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, ttraff.cc, which is designed to lure users into clicking on potentially harmful content. The embedded URL is disguised as a search result, indicating a phishing or social engineering attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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.
  • 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.cc/pify?keyword=postgres+timestamp+format+milliseconds
    • http://xurapuv.bscleathers.com/uploads/1/3/0/8/130874063/zaruwuwemupefo-jaletu.pdf
    • http://files.christevan.net/uploads/1/3/0/8/130813378/83e2889fbc1d0a6.pdf
    • http://fijesidad.pcovenant.com/uploads/1/3/0/8/130813979/povuvelovuwal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/dukekikavarabez.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2153/files/winston_mathematical_programming.pdf
    • https://cdn.shopify.com/s/files/1/0434/1976/2840/files/35646996013.pdf
    • https://cdn.shopify.com/s/files/1/0450/3171/9070/files/amino_acids_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/kenifuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/vitavorepuxubi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9437/5576/files/caperucita_roja_con_imagenes.pdf
    • https://cdn.shopify.com/s/files/1/0440/5107/1126/files/angular_reset_form_dirty.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdf
    • https://cdn.shopify.com/s/files/1/0437/9043/4456/files/61148460969.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/games_workshop_warhammer_40k_rulebook.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_off00046c94.bin
ccf1a31b0ff9da6beac3892ee2194a3dbb2a6e27497ed2ac541ea21a1418daac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C94 5476 bytes
font_01_sfnt_off00047f19.bin
b002af3bcc890e5b15d4b011a6f021de061ed140b3012e4f8199d1388ab000a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47F19 13964 bytes

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