Malicious PDF — malware analysis report

Static analysis result for SHA-256 00989e88276d639d…

MALICIOUS

PDF

57.7 KB Created: 2020-08-15 05:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb63f97a7196589667189df9afcf0127 SHA-1: 28216aacbea297bbab09436d4b9f4a321abd56f0 SHA-256: 00989e88276d639d5e8a75ee3e4e8e0429e530962dc60ba55d777ef3c062ac0d
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The presence of a visual 'download' button further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=avrdudess+2.+2
    • http://files.centraldrivewayswarwick.co.uk/uploads/1/3/0/8/130814169/mobufelepaforu_mafusumonu_bedabafilex.pdf
    • http://files.pacehighchoir.com/uploads/1/3/1/8/131871891/2056809.pdf
    • http://files.influencethechoice.org/uploads/1/3/1/4/131438226/3d08f32.pdf
    • http://doxawe.glengramling.com/uploads/1/3/0/7/130775934/poberugawod.pdf
    • http://files.carplakesfrance.co.uk/uploads/1/3/0/7/130776775/e0f881.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9977/3341/files/brother_printer_drivers_dcp-_t510w.pdf
    • https://cdn.shopify.com/s/files/1/0431/7360/9636/files/15673213952.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pegumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/jojafaburunabelezebala.pdf
    • https://cdn.shopify.com/s/files/1/0434/0246/1351/files/52063353044.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/texas_county_fips_codes.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/bipolar_disorder_for_dummies_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/ave_maria_beyonce.pdf
    • https://cdn.shopify.com/s/files/1/0429/3804/0487/files/4687508823.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/46464881686.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_off000097ad.bin
aefb7807f7e31529de23bf4c60c02849c8e7f99d3210e87094f6ff77db43dc22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97AD 4792 bytes
font_01_sfnt_off0000a814.bin
b7252a58f331db2a06cb9ef60aaa553a097ffe6f6849982d59e6d08d7112e970		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA814 16148 bytes

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