Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03f52659ead39ec…

MALICIOUS

PDF

49.3 KB Created: 2020-09-05 11:39:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb792586f3edc28a3e3bcfd9e10912d3 SHA-1: 15b7e4fefe4a881a5429174f936c4ce175c7a56c SHA-256: b03f52659ead39ec1cbeb570ff025a9b445a4fa37c67a5cb646b5183be2cc77c
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many pointing to external PDF files, suggesting a link farm or redirection tactic. One URL, 'https://ttraff.club/wix?keyword=the+landlord+movie+parents+guide', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document body contains obfuscated text and the malicious redirector URL.

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.club/wix?keyword=the+landlord+movie+parents+guide
    • https://static.usrfiles.com/ugd/7c1f05_3504d0a213fa45caa20e9cae07b3987a.pdf
    • https://static.usrfiles.com/ugd/b8c837_19e593bc5c9b4d1da50ad1c063c1cd0a.pdf
    • https://static.usrfiles.com/ugd/7dfe85_254feab1253f430ea333563d01e78cad.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0f4b80d85d444b39ac73b639e11c68e.pdf
    • https://static.usrfiles.com/ugd/b47706_8fe5b0c68c1f44f58b2bb6d631800e89.pdf
    • https://static.usrfiles.com/ugd/37987b_b3df5b17149844f9844c74cd58043886.pdf
    • https://static.usrfiles.com/ugd/1cfe37_b1973dfbbd4846c8a52af1591142cb93.pdf
    • https://static.usrfiles.com/ugd/f80014_d21be038510445cdae08e5eba079e8f2.pdf
    • https://static.usrfiles.com/ugd/1e32c2_4e6f958e9fff47c6ae8b79d724745b40.pdf
    • https://static.usrfiles.com/ugd/6908d7_7d3086b5ff6445acbb96a94119f303f2.pdf
    • https://cdn.shopify.com/s/files/1/0436/5477/4949/files/makalah_penyakit_jantung_koroner_lengkap.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/garevagadomezopasesorofa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/4187867355.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/6012371751.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_off00008257.bin
9be9d83bb29ba54774200783909775d6baf8ece7873b20e24498dcae5919bc2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8257 5384 bytes
font_01_sfnt_off00009481.bin
cf50311231e9643c89738a94b115557c328ea29835b22da3a4b2679310750ca3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9481 10512 bytes