Malicious PDF — malware analysis report

Static analysis result for SHA-256 6990ab75c5ac9c94…

MALICIOUS

PDF

32.1 KB Created: 2020-09-03 06:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 135b4d888dc9a9b30e5abe281971a5a7 SHA-1: 05cc35a9471fbc415943b45b4f7c6f210ac95b30 SHA-256: 6990ab75c5ac9c94ff5e7dda25fecc96399af40f6c083942847e9e40a103e839
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=argentina+flag+image+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting it. The presence of numerous other PDF links points to a link farm or SEO manipulation tactic. No scripts were extracted, but the malicious link is the primary indicator of compromise.

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.me/wix?keyword=argentina+flag+image+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_20bf0c9171154a18bdc394bd83543d88.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9e56c4964434c38bf0d2211db45100d.pdf
    • https://static.usrfiles.com/ugd/b8c837_64db29e16dae4f79b5eeb78c8e0a4e86.pdf
    • https://static.usrfiles.com/ugd/12745a_b44ea7c82c134e7c82c523cf3a6f57ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2054b899cf84fc094ad39843c379632.pdf
    • https://static.usrfiles.com/ugd/86319b_574961bf12fa4dcaa58fbd7e1e1243c3.pdf
    • https://cdn.shopify.com/s/files/1/0464/6122/3080/files/solamente_una_vez_agustin_lara.pdf
    • https://cdn.shopify.com/s/files/1/0432/7263/4533/files/28354645167.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/87123873226.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/radijipuwelodewoxaxubez.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/jemedawigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/discord_markdown_syntax.pdf
    • https://cdn.shopify.com/s/files/1/0461/9993/1038/files/xiwanet.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/lowes_troy_al.pdf
    • https://cdn.shopify.com/s/files/1/0445/8338/7295/files/amphitryon_ignacio_padilla.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_off0000447b.bin
2e7cf3f3a616713876b2085d1e169436fdf355266a379591798d8a5c91596334
pdf-font-stream PDF embedded font (sfnt) at offset 0x447B 4900 bytes
font_01_sfnt_off00005514.bin
9fae7117c0713f24559a569d6c82ab314132002c7ebda484097ae5248c7345f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5514 9208 bytes