Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25df96c0d7b3141…

MALICIOUS

PDF

58.1 KB Created: 2020-08-30 20:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e20903207b905ca6acc3aca3c973339d SHA-1: d6a35c59a2a65b6fd234c319d099fddbc7885f09 SHA-256: d25df96c0d7b3141c50610ccdb4279d2ddf3e02e60af33b89a3e2b0bfb6dff50
154 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 URL is presented in the document body, likely as a lure. The PDF also contains a link farm heuristic, suggesting it's part of a larger SEO poisoning campaign. The ML classifier strongly indicates maliciousness. No scripts were extracted, limiting the analysis of the payload.

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=java+bloom+filter+library
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/fevatibawoxexudajoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/29242940829.pdf
    • https://cdn.shopify.com/s/files/1/0434/5957/5958/files/machinery_handbook_30th_edition.pdf
    • https://static.usrfiles.com/ugd/0d9a50_76025f18637444f28b83c33eaf147a2b.pdf
    • https://static.usrfiles.com/ugd/430cb2_d3c6829d4676493bab04bde593db9b9c.pdf
    • https://static.usrfiles.com/ugd/3649d2_e0ca0c2c517343aa9639490e61c8bbe5.pdf
    • https://static.usrfiles.com/ugd/63022f_375cdfe383554443a6446a85990b77e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e146d0eb4fd48cd9c641ffc48614c7a.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_ed5f7895eeb147a6a265f6b63bc8891b.pdf
    • https://static.usrfiles.com/ugd/b8c837_497dc99242c144dbba8b873bab2c1a97.pdf
    • https://static.usrfiles.com/ugd/b8c837_9aa06bbc0fc2415db93f5d392d6eafc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_0db9ade3fb8a4bf696c58fb475f2e1d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a86cc98d60f048a99d863c5b6d6b8d42.pdf
    • https://static.usrfiles.com/ugd/b8c837_b53e9525bd1749be8c2034ce0e38c3fb.pdf
    • https://static.usrfiles.com/ugd/80bfa9_36660818312b462d93609a496349e072.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_off00008e63.bin
9f65b35037cbedaa1ed191cb19fe84f4b5531bbef41ef43033e8a64ec2875951
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E63 4708 bytes
font_01_sfnt_off00009e74.bin
7bc2f25cd4d8782714ff6366a97be53479e7e6e9947a2c935913b9d3d82994d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E74 15040 bytes
font_02_sfnt_off0000cd44.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD44 4324 bytes