Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0422dbf74f9fcfa…

MALICIOUS

PDF

46.1 KB Created: 2020-09-05 08:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21b2ad80e2f6b714e742cebd5913adba SHA-1: 65100157d07c04ab7f53d0f6cb3204343841041e SHA-256: d0422dbf74f9fcfa54de50d5ad8e8e43ab7236a8568f15a2e2191f00820106b0
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of a large number of external PDF links, many pointing to benign content, indicates a potential SEO poisoning or link farm tactic to improve search engine ranking and visibility for malicious documents. No scripts were extracted from this sample.

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.link/wix?keyword=gear+backlash+calculation+pdf
    • https://static.usrfiles.com/ugd/18122d_7d47dae178484e14af0a166aef07fc77.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0e62151f5aa4009897c31c951668580.pdf
    • https://static.usrfiles.com/ugd/eb6612_07a17bc6fd534311bcfcee717cde0d73.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/minecraft_auto_sifter.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/42143632261.pdf
    • https://static.usrfiles.com/ugd/72b0e7_0b40899c14c4463e8280f430c364cf5d.pdf
    • https://static.usrfiles.com/ugd/0c4177_227070699a5b444ba909dc401f1c79ad.pdf
    • https://static.usrfiles.com/ugd/804ff6_a3a44fd79676470f8083b335e313069b.pdf
    • https://static.usrfiles.com/ugd/d162e3_cbff7201fda8476f996cfb65ba2653a4.pdf
    • https://static.usrfiles.com/ugd/2486b5_d9f0140de0644149a36134efe6bd1036.pdf
    • https://static.usrfiles.com/ugd/8f6098_8a2507bd845f46088cf527b4940b8a64.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_off000061a5.bin
07a01aa6c9b284217eead7999177850f901f0a949b6c3d09b5b8a2362f5a8884
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A5 5476 bytes
font_01_sfnt_off0000743f.bin
9c247b8a40decde4baeb245286754a0a4148b4df957a77a08cf2b340db3a1e40
pdf-font-stream PDF embedded font (sfnt) at offset 0x743F 10108 bytes
font_02_sfnt_off00009705.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940
pdf-font-stream PDF embedded font (sfnt) at offset 0x9705 16036 bytes