Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d107d73edac769…

MALICIOUS

PDF

45.7 KB Created: 2020-08-31 03:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e26909d5b6c28af972c2ef7fffe5d8c9 SHA-1: 47cedf8104e9d6cd98374f25298b5a0750cfad2d SHA-256: 28d107d73edac769320f8afa4315fa5a5e3153402fadd217dcb0d420a3cdfdbc
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Admiral gta san andreas', suggesting a social engineering tactic to entice users to click the malicious link. The ML classifier strongly flagged this PDF as malicious.

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=admiral+gta+san+andreas
    • https://static.usrfiles.com/ugd/b8c837_65973569031d47b687af180330fcd4eb.pdf
    • https://static.usrfiles.com/ugd/b58d21_f4d734289c044945a0f372a9b67476cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_0430d59fc6b84d73877ca041e394734c.pdf
    • https://static.usrfiles.com/ugd/857e61_3f0cb9d1eb7043968604eb03edd9f9cb.pdf
    • https://static.usrfiles.com/ugd/345929_9849ef20b03c4fac86b8343cb6316105.pdf
    • https://static.usrfiles.com/ugd/83e24f_8b651247ffa84362b77d3548e798a4d4.pdf
    • https://static.usrfiles.com/ugd/f0e51d_4a44194c8d994d08a0e83ecf4316ca3d.pdf
    • https://static.usrfiles.com/ugd/20d83a_491e9e0b393b437eba52a7c95ff2b744.pdf
    • https://cdn.shopify.com/s/files/1/0429/9177/9999/files/7724283073.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/xisoxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/dekasegenometaxowewabubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/giancoli_physics_4th_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/84221991371.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://cdn.shopify.com/s/files/1/0437/6474/4343/files/vebelivepuretazolaj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c7.bin
6dc4f03b817abb906f845dacef8e8a7823a37ae8f2ddac72ccd07080ef4a0c9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x68C7 4812 bytes
font_01_sfnt_off000078f2.bin
5faaa201168916ea16771b8538873893b22dd7a44c5a62ed60e5a2b3558a5dca
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F2 10304 bytes
font_02_sfnt_off00009c27.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C27 4324 bytes