Malicious PDF — malware analysis report

Static analysis result for SHA-256 08567d14bf307430…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 13:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddcc11be2656fa8f4102e48a09c311a6 SHA-1: 1a72617a05dc32c3799ee566095634b7d25f9dbe SHA-256: 08567d14bf307430493315079b4eb717ec3b8ff6c775a125efbac08ad7553d74
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful destination. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting a tactic to artificially inflate search engine rankings or distribute malicious content. The ML classifier also 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.com/wix?keyword=coronilla+de+la+divina+misericordia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_d3eeb3ced771494d89cdb5f217548af8.pdf
    • https://static.usrfiles.com/ugd/b56239_f89e20697b574a51a03fde3588fde006.pdf
    • https://static.usrfiles.com/ugd/43d598_883c198ae9dc4e9eba04cf4832387e31.pdf
    • https://static.usrfiles.com/ugd/b8c837_6af028dd38a34b048515a74489ae655a.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_9cd3dafe50824caf8979ace6356fa9c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d1f8fe4a33d46089843b871d05a5bbf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevebetivegukubevam.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/60463060325.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tovunegorudakumuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/kjv_bible_app_for_pc.pdf
    • https://static.usrfiles.com/ugd/b8c837_f83f012773864f15b88dd7246eeb3c87.pdf
    • https://static.usrfiles.com/ugd/de3d83_0ca1428e47db49948b8e8c70848ede1f.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_98ae9632fe934dc193ef84d26872ca2c.pdf
    • https://static.usrfiles.com/ugd/a771bd_83dbf67e95c54c758813dddf0b8b6ae2.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_off0000658f.bin
08fd559d639b5c6d88bbbaeeec3ac86cac3086dd73b2140b9077cfc7667a1505
pdf-font-stream PDF embedded font (sfnt) at offset 0x658F 5048 bytes
font_01_sfnt_off0000769e.bin
a9051e84ea923096ade138f47037f437aa0836e170374f1c48903570bee61ad9
pdf-font-stream PDF embedded font (sfnt) at offset 0x769E 10748 bytes