Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1454054d43e864…

MALICIOUS

PDF

46.9 KB Created: 2020-09-08 10:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dee945f1a84cef58a9cc91a4fcab68dd SHA-1: 861f332414ad6e8a23f25371f86cc44f53045481 SHA-256: cc1454054d43e8647ea174753cebc7f78f9679070e84f491e18ebc34cdbe646b
152 Risk Score

Malware Insights

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

This PDF document was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.club'. It also contains a mass of external PDF links, indicating a link farm likely used for SEO poisoning or to distribute malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the presence of numerous links suggests a social engineering attack aimed at redirecting users to potentially harmful sites.

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.club/wix?keyword=elements+of+computer+graphics+pdf
    • https://static.usrfiles.com/ugd/b8c837_eebae45992ab439ba4e4491924dd2d86.pdf
    • https://static.usrfiles.com/ugd/bf57b5_4ecacd3d53c94148bb8a3bf2df523d71.pdf
    • https://static.usrfiles.com/ugd/269bb8_8b1892df31194575bd84e027d1360750.pdf
    • https://static.usrfiles.com/ugd/771ea4_1abab387d2f0444bbe8997d84f3fb472.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/mofapisoneb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8320/2711/files/ragiminowor.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/guide_to_intelligent_data_analysis_download.pdf
    • https://static.usrfiles.com/ugd/87d215_ee955297910b4e1a83373af049a2c4a4.pdf
    • https://static.usrfiles.com/ugd/30e015_6e7630949323443d8a5bcc72306d891a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9392dc60f584dd284b52b48ee785044.pdf
    • https://static.usrfiles.com/ugd/96bf9d_f324343a0a4a4a0a934999a330d1fc2d.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_off00006280.bin
f2503c60329710cfe84cdd7454564dfb5dcae9c24dabe7898d254aa6e524faee
pdf-font-stream PDF embedded font (sfnt) at offset 0x6280 5524 bytes
font_01_sfnt_off00007524.bin
93a0edb3ecddb128c31500e96d2b25d6e4c49462f65479328907f16843ee1a85
pdf-font-stream PDF embedded font (sfnt) at offset 0x7524 10376 bytes
font_02_sfnt_off000098d1.bin
6f2d183bf7ea14f9aa589130d940aa6735a07275d9481323ca19350b5ea87dc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x98D1 16040 bytes