Malicious PDF — malware analysis report

Static analysis result for SHA-256 497168b72c265dc6…

MALICIOUS

PDF

43.3 KB Created: 2020-09-01 03:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cccd47c2b0bdc4e79088b13aa1b6f570 SHA-1: 10ea29fdb377a2050e569b62dfb83c6333a2e020 SHA-256: 497168b72c265dc6b148f01b05703fd26c25f83163d91786253958dc0355ca75
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to shopify.com domains, but one critical link to ttraff.ru is flagged as a malicious redirector. This suggests a link farm or SEO manipulation tactic designed to lead users to malicious content. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=perforated+steel+sheet+south+africa
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/canon_powershot_sx80_hs.pdf
    • https://cdn.shopify.com/s/files/1/0432/1162/0509/files/58392908473.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/mystic_messenger_mod_apk_latest.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/bC3BCyC3BCk_cevC59Fen_indir.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/13930425877.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/29469965707.pdf
    • https://cdn.shopify.com/s/files/1/0435/4156/1503/files/fubosidubukavemizorafiles.pdf
    • https://static.usrfiles.com/ugd/b8c837_2556911f02764007aacff729e7e70393.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4837befdb2a4bf5a76f523b1d8c8e87.pdf
    • https://static.usrfiles.com/ugd/b8c837_187e6a07cd594147978832de4c0a387d.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_off0000625b.bin
cf8f4945405ac94a09853d67ba091dcaa1f1eb5d373f79f95fa14038ff635b8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 5112 bytes
font_01_sfnt_off000073b3.bin
d63e70a51bf243bb96225193bd6bdf85e30673c22c2fc24eaa238bac06386f5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B3 14480 bytes

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