Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bdd39f2bf6d31e…

MALICIOUS

PDF

37.6 KB Created: 2020-09-01 06:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39a42c5841e4b011d35485f72d8d6fad SHA-1: 17871648bf9367c49c1f42c3c8c4199c8d54e041 SHA-256: 37bdd39f2bf6d31e489d46e4f00d2bf4f951c2342abf1e626baf68aee45f317c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, reinforcing its role as a lure. The PDF also exhibits characteristics of a link farm, suggesting a broader SEO-based distribution strategy.

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=bekhayali+song+ringtone++dhvani+bhanushali
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/45466346791.pdf
    • https://cdn.shopify.com/s/files/1/0437/4256/0405/files/jizalikizuwozuzokonos.pdf
    • https://cdn.shopify.com/s/files/1/0449/9256/1310/files/80736096543.pdf
    • https://static.usrfiles.com/ugd/b910ae_b4c5b7f4dad04ec28d635ce40060769b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec925e2f30cc4cc69696953a6fa378ec.pdf
    • https://static.usrfiles.com/ugd/10a4aa_746a43669fc043d6ada23407853c5506.pdf
    • https://static.usrfiles.com/ugd/b8c837_dad603711759498baecad27aba6bcb64.pdf
    • https://static.usrfiles.com/ugd/b8c837_1dfe8f8888b8491f80ea938412e789d6.pdf
    • https://static.usrfiles.com/ugd/ca300b_763d19419e0c4de8b2899d17445f2b99.pdf
    • https://static.usrfiles.com/ugd/b8c837_4de5c01c304244a2830e8bc241186176.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/latitude_and_longitude_by_zip_code.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/durebibaxunegarugagaw.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_off000047cb.bin
1017699c36f42f4f8fcf554bdbf348a29386548bfad746b808a66fabed969179
pdf-font-stream PDF embedded font (sfnt) at offset 0x47CB 5384 bytes
font_01_sfnt_off00005a12.bin
aaf7a1acf5c9566b158c837ae79e1e7a82a14de9ea79ffdbcf503361d3b3cd76
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A12 9672 bytes
font_02_sfnt_off00007b4e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4E 4324 bytes