Malicious PDF — malware analysis report

Static analysis result for SHA-256 a569ff3113fd07ef…

MALICIOUS

PDF

37.9 KB Created: 2020-08-15 18:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09247df336cd0833bbc9a26e8b3c72f9 SHA-1: 32ce516c413408f73d5076cedd5aec97c27bbadd SHA-256: a569ff3113fd07ef8336cf3e4bf2a5d3e58fb1ec9ef5a334cb2893bb08668a00
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059.001 PowerShell

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains, forming a link farm. One of the primary links, https://ttraff.ru/pify?keyword=chogada+tara+garba+dance, is identified as a malicious redirector. The document's structure and the presence of a malicious redirector strongly suggest a phishing or malicious redirection attack pattern designed to lead 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=chogada+tara+garba+dance
    • http://files.hourglassfitnessclub.co.uk/uploads/1/3/2/7/132740949/mexizekuzevowaba.pdf
    • http://files.decaturpi.org/uploads/1/3/0/7/130738859/mugobakaxejido.pdf
    • http://files.fumctupelo.com/uploads/1/3/0/8/130814529/momurajoba.pdf
    • https://cdn.shopify.com/s/files/1/0447/9988/5463/files/92736512447.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/gitaxonapovozewopita.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/43409087161.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/nitilabisugosamewibukeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/xukowovemed.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/75617344955.pdf
    • https://cdn.shopify.com/s/files/1/0435/4847/5541/files/jurnal_bronkopneumonia_pada_anak.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/um_flint_sis.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/88165126160.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_off0000418f.bin
5227a0e27e34f733e2f82280a8aaf962e8712062810a6e4b5333eab351091934
pdf-font-stream PDF embedded font (sfnt) at offset 0x418F 5036 bytes
font_01_sfnt_off000052aa.bin
71ff73c2e5cdaae4e0c54800396dae5116353b2153c6a718b12d23d78f30419f
pdf-font-stream PDF embedded font (sfnt) at offset 0x52AA 10128 bytes
font_02_sfnt_off00007556.bin
7e0863d6dcdfe3ce59f67395a06e5e8634226e44f713773c85e494ff6d119ee1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7556 16344 bytes