Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeae67f1798d40e4…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 21:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddf9d3b47e84ab162d213492ea9aa42e SHA-1: a19c2267388c0fc32d3ac5a2094f096d2518b702 SHA-256: eeae67f1798d40e4311b1170fd9ee8b5d02121e181e8b650dad7086424352d3b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body contains the primary malicious URL, suggesting a lure related to 'recording app free jio phone'. The combination of these factors indicates a likely phishing or malware distribution attempt via a link farm.

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=recording+app++free+jio+phone
    • http://files.mnjeweler.com/uploads/1/3/1/4/131437740/fomurogoxufirofaliz.pdf
    • http://files.lakeridgedance.com/uploads/1/3/1/1/131163832/jedew.pdf
    • http://files.khimacademy.com/uploads/1/3/0/9/130969663/jimexetuxozub-kuxonexiralug-porekurobinew-kavotuxutusipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0843/4077/files/66270325993.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/jopubomoxakezawuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/minutes_of_meeting_template_free_excel.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/disgenesia_gonadal_pura_y_mixta.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6733015585.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4838/files/wexufelaruferi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/lususibulomasusiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/86127222900.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/xuginuxoxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3410/6277/files/10._4_cell_differentiation_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c33.bin
e712bfece154a73b5d4b7342177505d85701b1d03b2cc673177b638c11ea5824
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C33 5288 bytes
font_01_sfnt_off00007e32.bin
3a0b9c1201a94bf9d56dcfb067e6860b313eacb32374a58cdb042de23e4a339f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E32 10128 bytes