Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cb6d6f2e5b6f99…

MALICIOUS

PDF

32.8 KB Created: 2020-08-08 04:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5e727d95a46fdfce0b46c83746a2412 SHA-1: 85ba4c583ef4a7e39c83477fc44ab32498d784eb SHA-256: 06cb6d6f2e5b6f9962ef546510c0d115659728814745d6e6867b88608ab5104f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body itself is heavily obfuscated but contains references to the redirector URL and a large number of other PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=etica+y+coaching+ontologico+rafael+echeverria+pdf
    • http://files.petportraitsbyjen.com/uploads/1/3/0/9/130968993/3269997.pdf
    • http://files.kristinjerickson.net/uploads/1/3/2/6/132695586/3112540.pdf
    • http://files.smwunlimited.com/uploads/1/3/1/4/131454034/cb5eb4.pdf
    • http://files.students.norledgemaths.com/uploads/1/3/1/0/131070450/misozovir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/89284040098.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5881/files/light_bearers_a_history_of_the_seventh_day_adventist_church.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/vamafe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2311/3119/files/reverse_a_string_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/arduino_mega_2560_pinout_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/paditufepibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/sikegesidig.pdf
    • https://cdn.shopify.com/s/files/1/0428/5258/1542/files/wizekebalusakanopogobaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4823/0297/files/xujaxokuwenenofu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0735/0696/files/vubajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/xezuwubidutelaxuzuvubebe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004484.bin
478664485a529f982a5b4533cccafe3e0088d3ad6aff78be8ede5e1be7c228ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x4484 5356 bytes
font_01_sfnt_off000056ce.bin
0c39c5da31ef36a42c0f59155deecc84c3f9558867997324c17512e14b15c0e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x56CE 9104 bytes