Malicious PDF — malware analysis report

Static analysis result for SHA-256 6823f4e26901d2a8…

MALICIOUS

PDF

32.3 KB Created: 2020-08-19 13:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eef7a38a4a8f6e56dfe53c92a7692a06 SHA-1: fc88edcf92c1c5b7d3456fdf9cb155cfa3c676ef SHA-256: 6823f4e26901d2a83bfb1055273035aa5a8a78a2279a2cd2f83da179e22d00bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits a PDF link farm heuristic, with numerous links to Shopify-hosted PDFs. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to lure users to malicious infrastructure, potentially for further exploitation or phishing.

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.com/pify?keyword=adare+ahawarai+mp4
    • http://files.dawnhomesut.com/uploads/1/3/1/6/131637876/nifak_toluvenizif.pdf
    • http://files.stjohnsmtpleasantmi.com/uploads/1/3/1/0/131069763/dixajukinebiv_mumiwuvopini.pdf
    • http://xamokep.mileandathird.com/uploads/1/3/2/6/132682859/87d898b8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9575/2858/files/70182793936.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/72343858005.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/93075952838.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/51236356173.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/65843800052.pdf
    • https://cdn.shopify.com/s/files/1/0433/6828/4319/files/73607345958.pdf
    • https://cdn.shopify.com/s/files/1/0428/4012/9692/files/47845251403.pdf
    • https://cdn.shopify.com/s/files/1/0450/9810/7045/files/rotten_tomatoes_api.pdf
    • https://cdn.shopify.com/s/files/1/0438/3178/7670/files/o_ceticismo_da_f_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8402105605.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0954/files/da_705.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_off000040cf.bin
d8ec1670c6780830ef5bff05682144ee6e8cbda8ee7e756695ef87e64dcb864d
pdf-font-stream PDF embedded font (sfnt) at offset 0x40CF 5160 bytes
font_01_sfnt_off0000524c.bin
2d2b5d9787dd1ebe5887c61a82052fd032c72e60698ad47f5f125540497be1a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x524C 10144 bytes