Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08622ec77cc442a…

MALICIOUS

PDF

38.0 KB Created: 2020-09-13 23:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 338151a268b60d442d07a6fad6580f81 SHA-1: 2ecdaa876ac6a9f3b6c9c94bfdeaf9dbf29d0e8b SHA-256: a08622ec77cc442a4a0e7762852d18e0d62dd17f21d4f97ebbffd1b7760701a0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'Tennessee driver's manual', suggesting a lure. The ML classifier also strongly flagged this PDF as malicious. The primary malicious URL identified is https://ttraff.me/wix?keyword=tennessee+driver%2527s+manual+questions+and+answers.

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=tennessee+driver%2527s+manual+questions+and+answers
    • http://files.rutgerscki.org/uploads/1/3/1/4/131406507/5739979.pdf
    • http://pesal.paschalorchestra.com/uploads/1/3/0/8/130873951/57a68158c48e3.pdf
    • http://zijilokog.emasullivan-bissett.com/uploads/1/3/2/6/132695839/ef1050cecbfed1.pdf
    • http://bogew.barcfriends.com/uploads/1/3/0/9/130969264/363dbad.pdf
    • http://midadun.allisonjjanda.com/uploads/1/3/1/4/131408864/tefirozinanut-komolovogekakon-xabagu.pdf
    • http://files.sacredmotherarts.com/uploads/1/3/1/4/131437987/nekuvu.pdf
    • https://static.usrfiles.c
    • https://static.usrfiles.com/ugd/764aaa_ccc00217dc0a4541964bda93d80fdad2.pdf
    • https://static.usrfiles.com/ugd/b0cb2d_e512b2ce952947eb8cc711743db16797.pdf
    • https://static.usrfiles.com/ugd/828753_9c1ba3e7b1e34824aa86e01d3e709d28.pdf
    • https://static.usrfiles.com/ugd/36f25b_10bb4b6a8479467fa434b203b44fdc6f.pdf
    • https://static.usrfiles.com/ugd/6a22cb_df37b0399db54cb7af7fbf15b68d2231.pdf
    • https://static.usrfiles.com/ugd/6116da_2c9b593da5c04757840f3b1cd99f1b9f.pdf
    • https://static.usrfiles.com/ugd/8a419d_22513ef9d7c44fe68c9a63bb922bf2a2.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_off0000586c.bin
a8230aee4de6fd0c48bfd37f37e0b65bf88104477c66ae3a92d6e263ad165c7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x586C 5232 bytes
font_01_sfnt_off00006a2f.bin
2d031ce5c46bde09df0b0622895295146d3512079e371c9e36f715c02222b0c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2F 9540 bytes