Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6a9c3cb1b6cc1e…

MALICIOUS

PDF

37.0 KB Created: 2020-08-19 08:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e500619a1ade2baa57c3f60a6092d882 SHA-1: 1850d9c9e810f4447d41e0fb5c82dafaca59ee83 SHA-256: db6a9c3cb1b6cc1e2ea7d02361df90e8c864b3e4f71dc7931bd4786715111eb0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The file also exhibits characteristics of a PDF link farm, with numerous embedded links to Shopify domains, likely to obscure the malicious redirector. The ML classifier strongly indicates maliciousness.

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=where+to+report+coverdell+esa+contributions
    • http://xexon.aliveballetacademy.com/uploads/1/3/1/6/131637836/pilujekinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/jutoximoxewokopada.pdf
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/durumololazujiverutefod.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/pujarenunegomafesevepiku.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/sewufakesifonaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/38030242073.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/majupesunawuxadibimimepu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xozujegemuzudileruzodedus.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/puzofeluwubufinugowibopuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0174/0439/files/74904905130.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/bhavesh_joshi_superhero_movie_bluray.pdf
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/anandamela_magazine_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/9270/9271/files/tatadulukujikutibigej.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000526c.bin
5e892d5a01bbb51739dccffbf1b9abe186330478471c06a7b06e1117036807d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x526C 5376 bytes
font_01_sfnt_off000064b6.bin
3899d998777043625b1011139ae7c241af0c49694b2983646fea261709108f21
pdf-font-stream PDF embedded font (sfnt) at offset 0x64B6 10136 bytes