Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bbdda794e32b5c…

MALICIOUS

PDF

50.1 KB Created: 2020-08-30 14:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09f5b5155b636703c0b87d4b51b86d12 SHA-1: 6d6e8f1fd2bed4e9ce52d94b4005837af5019480 SHA-256: 83bbdda794e32b5cde8443d08f4e748e11e7c6360a46956d65a66f2567e2f9f8
152 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=l+histoire+du+proph%2525C3%2525A8te+youssef'. This URL is likely used to redirect the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, reinforcing the attack pattern.

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.me/wix?keyword=l+histoire+du+proph%2525C3%2525A8te+youssef
    • https://static.usrfiles.com/ugd/5cf23b_dd29d560171d41fd86916b6d3c54fadb.pdf
    • https://static.usrfiles.com/ugd/9c43ec_346f8ae98d1b449f963b5a64f1dfd2e5.pdf
    • https://static.usrfiles.com/ugd/f1780b_63ac870388ba443a9673474d045f1522.pdf
    • https://static.usrfiles.com/ugd/b8c837_01e1234bd0d24316aa0dcd253e7169a6.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/mercer_weighted_grade_calculator.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf52e3c9035c4fc5ba97cdc78f330aad.pdf
    • https://static.usrfiles.com/ugd/b8c837_0eb317c6c08c4944bd06ab3bc6abdd0e.pdf
    • https://static.usrfiles.com/ugd/a18aa6_ace1b2eefc794a18a7a738afd759f3f4.pdf
    • https://static.usrfiles.com/ugd/ae15ca_fcc9d9a1877c452181a06514695a067a.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/kases.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/92255737452.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9191/files/zizonetasokoliwiwuwaje.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/safijurujafesakixunoda.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/
    • https://static.usrfiles.com/ugd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000840f.bin
d1ec31a61acf5cf838a4c3c4a06eb35e3492551fe84e409832e3f502f84ba433
pdf-font-stream PDF embedded font (sfnt) at offset 0x840F 5072 bytes
font_01_sfnt_off0000950c.bin
e1ee19667304e5c8e2157d75323119baa71fd3a0c63feda2ad0ee626a30af7ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x950C 11064 bytes