Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d47cd1fc4b300f9…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 06:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58a4c7cdae51ce6f3a570ece909076d9 SHA-1: 0b162f68aba3608f002e4961f8d03400c5920225 SHA-256: 0d47cd1fc4b300f9d05af86e022989cc8537b60ec3dbb3362286a0dd0a672a9d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.ru, which is associated with malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to download-related keywords and the malicious URL, suggesting a lure to trick users into clicking on malicious links.

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.ru/wix?keyword=psp+iso+free+download+for+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/822ecd_ff90e6edd5ba4a6da11eaea07455431e.pdf
    • https://static.usrfiles.com/ugd/5be868_162d9a6d0b784c16bdad9467abad7433.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_16d26181eb72496b8e5844559ce08262.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb835e4e5b2b4850a9dce70c08322263.pdf
    • https://static.usrfiles.com/ugd/b8c837_25f619fe66cf499da623bac0f75446b7.pdf
    • https://static.usrfiles.com/ugd/41a0b6_ffc679d1ece04fc4b29af87c8b0410f0.pdf
    • https://static.usrfiles.com/ugd/0d2908_cc474c5571d743659c995922ddeca0fc.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rewosegukedisupagur.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/30797999583.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2185ba3afda4099aaefaab0fd0320ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_71bf347a23e549af87e1aa222d67113b.pdf
    • https://static.usrfiles.com/ugd/0049ca_af5cf7cf306243ef9796bc3aeb73daf6.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_cdcc1363ff9e49108641b7101f05b73d.pdf
    • https://static.usrfiles.com/ugd/ed64d2_345309171bc14d999003e360eb84a4f0.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_off0000694e.bin
696bbcb63d1f21cfefb92e21ab867463a1a9f64a5adf7882cb506292c28bf194
pdf-font-stream PDF embedded font (sfnt) at offset 0x694E 5128 bytes
font_01_sfnt_off00007ada.bin
a9869b63e9b1dceb0b5828d3d71cd7cc21d95a2802241d98dddb28c28882f6dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADA 9900 bytes