Malicious PDF — malware analysis report

Static analysis result for SHA-256 222741ac66bef85d…

MALICIOUS

PDF

44.7 KB Created: 2020-09-07 15:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 250371f8ca1aeb4bad5ab39a3449ca08 SHA-1: e830969cfc4448f830df2855472e7a121f8dc577 SHA-256: 222741ac66bef85d147a50a8356b8273e4d9405b8b4bae4d2749fd5fd658ec57
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 'https://ttraff.me/wix?keyword=forbes+travel+guide+basic+standards'. This URL is embedded within the document body, suggesting a phishing or social engineering attempt to trick the user into navigating to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, further supporting the malicious intent.

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=forbes+travel+guide+basic+standards
    • https://static.usrfiles.com/ugd/c4ccc4_9b48504720c1441baceaae28c59a02b0.pdf
    • https://static.usrfiles.com/ugd/704f6c_20f922608239433bb75f64c2b26ca35a.pdf
    • https://static.usrfiles.com/ugd/a4e402_96eef05f1a5a4df88adecdd6c9952614.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bec7f00dfa645c18488ffa75b96729d.pdf
    • https://static.usrfiles.com/ugd/83b1b3_ba6839c97bfe4fefa30dc46381af983a.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd304fa80b284c0da156ffa63fbaaa78.pdf
    • https://static.usrfiles.com/ugd/724fb5_5b22614cb4004a7eb7b8861bb3189cbb.pdf
    • https://static.usrfiles.com/ugd/32777b_11dc6e34f58546d99ca5dd32092c90ff.pdf
    • https://static.usrfiles.com/ugd/d216cb_67e7ceb2ffd84a46814f33d676ea91a1.pdf
    • https://static.usrfiles.com/ugd/9c43ec_abed99cf6bdf4ad7ba31020d6845fdd1.pdf
    • https://static.usrfiles.com/ugd/808d8c_0654b673aabf472e83288af886e886d7.pdf
    • https://static.usrfiles.com/ugd/1cfe37_1275008cddb441e6b5dcbac038ce64d7.pdf
    • https://static.usrfiles.com/ugd/eb4c03_272b9f3f444049ac92e8f5c96a402fc1.pdf
    • https://static.usrfiles.com/ugd/880a7e_a7f54279924d46718cec3dd18d041025.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/
    • https://static.usrfiles.com/ugd/d216cb_67e7ceb2ffd84a46814f33d676ea91a1.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000713c.bin
c84714af3f5d264702226829ece8267eae8353771834fefe45825880edfb38e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x713C 5260 bytes
font_01_sfnt_off00008339.bin
1d114d412d3d90833082f7486ba78502735b620c20cff38e95e91e2c35377359
pdf-font-stream PDF embedded font (sfnt) at offset 0x8339 10040 bytes