Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ca64939ef34c8a…

MALICIOUS

PDF

84.0 KB Created: 2020-08-19 14:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e464579b98e6b1edfd2c6caf381f7b5 SHA-1: de8d07547176de55622ddbaa5f4fb8daaa2d70a1 SHA-256: 01ca64939ef34c8aa6bf2d7744bd61dfa5d058c0838247fa5b4fb61f32a05e61
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one critical heuristic identifying it as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=forscan+sync+3+spreadsheet'. Another heuristic indicates a link farm, suggesting an attempt to artificially inflate search engine rankings or distribute traffic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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.ru/pify?keyword=forscan+sync+3+spreadsheet
    • http://files.happyhealthysimplywell.com/uploads/1/3/1/3/131397987/dc021df30249e.pdf
    • http://files.shcscience.com/uploads/1/3/2/7/132740285/544a9ab.pdf
    • http://files.stjohnsmag.com/uploads/1/3/0/7/130776483/2b551af41914e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93016620893.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/27129576703.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/abraham_abulafia.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/free_email_list_2017.pdf
    • https://cdn.shopify.com/s/files/1/0431/9150/0961/files/80984298508.pdf
    • https://cdn.shopify.com/s/files/1/0436/6332/7385/files/knee_rehab_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0439/1455/9656/files/2424763211.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/20632236182.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/8183980163.pdf
    • https://cdn.shopify.com/s/files/1/0438/2860/9186/files/ototoxic_drugs_exposed.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f614.bin
f287a74ba8170559817c0fa7deb57505b36e5c512db5b3a39c7f56d0a1c4b9f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF614 5092 bytes
font_01_sfnt_off0001074c.bin
2ea2c8c54110aea92e564b8ad91716d232aa3e30564d8c8fdffe88d9969ddbb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1074C 14184 bytes
font_02_sfnt_off000134df.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x134DF 4324 bytes