Malicious PDF — malware analysis report

Static analysis result for SHA-256 075babdfcf9934bb…

MALICIOUS

PDF

43.9 KB Created: 2020-08-20 22:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c39011f0969f3761b6acc6e4c77d144e SHA-1: 4770cef462cc8191a5d7391b9679205b14c6c9e9 SHA-256: 075babdfcf9934bb42f162414decc7e61cc97a69511c27f63c09eba7deea5fe1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, many pointing to Shopify domains and others to unknown domains, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious, and a critical heuristic identified it as a redirector link. The document body itself is largely obfuscated but contains the primary malicious URL.

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.cc/pify?keyword=saree+blouse+block+cutting+method+pdf
    • http://files.cvma6-3.org/uploads/1/3/0/7/130776401/tololopekuzivepazupo.pdf
    • http://dizutufi.madesimplydev.com/uploads/1/3/1/0/131070043/4863748.pdf
    • http://files.truegritartgallery.com/uploads/1/3/1/3/131380666/guvag_vaduweneju.pdf
    • http://files.daycaring.com/uploads/1/3/1/3/131380728/jowitisirizoxa.pdf
    • http://zivobex.positivebirthlbc.co.uk/uploads/1/3/1/4/131406286/1b30dc7e926de6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56697352128.pdf
    • https://cdn.shopify.com/s/files/1/0437/4783/6065/files/bible_in_greek_and_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/fipagotuginakefum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/big_data_architect_s_handbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/wawiwerepekigeguriw.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/nesuxulore.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/nurifisatikotigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/921557615.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/21229961535.pdf
    • https://cdn.shopify.com/s/files/1/0432/8685/5840/files/88815290399.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/80873265215.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_off00006c5f.bin
bec8086ce827e7570609fa0ac688bf9cb93176c4f333d4a75d3789d4ed74b94e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5F 5876 bytes
font_01_sfnt_off0000802d.bin
5a668e29ed6e3dbf76e6f7e2bdf7e4ab3ea0c73072195a3a4d88c0d0f1f89cf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x802D 10076 bytes

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