Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f7821e705da8e0…

MALICIOUS

PDF

35.5 KB Created: 2020-08-23 14:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f9f299d327a09fd0b56dc520789d8c8 SHA-1: e93e3ba74acf9dfbe848bf2aa3e681c0745dc2a4 SHA-256: c7f7821e705da8e031343c0d1fbf1067e9e12ef87d33e3d7195860154f311ac5
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=norme+afnor+z44-+005+pdf'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains. The document body, though heavily obfuscated, contains similar URLs. The presence of a 'Password-protected archive lure' heuristic suggests this PDF may be part of a multi-stage attack, where the user is prompted to open a password-protected archive, likely containing a malicious payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=norme+afnor+z44-+005+pdf
    • http://vuladerid.seahavenhold.com/uploads/1/3/1/1/131164312/vozojodopaxevix_rirudebabo_xufiguj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/17570033430.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/ways_of_the_world_3rd_edition_chapter_11.pdf
    • https://cdn.shopify.com/s/files/1/0433/8565/1358/files/nolomesitanapunol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6776/8981/files/pixelmon_great_ball.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/defigutitezapebevurexo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/12682649079.pdf
    • https://cdn.shopify.com/s/files/1/0434/7805/7122/files/composite_materials_science_and_engineering_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4944/2713/files/63425959359.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/windows_10_disable_automatic_restart.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/57396442968.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/caprice_24_piano.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_off00004192.bin
62e405c0d977ab6f62c6ca67e0d7c4393f846f07ae4c8489deacd549d318d980
pdf-font-stream PDF embedded font (sfnt) at offset 0x4192 5040 bytes
font_01_sfnt_off000052a4.bin
5fee429dc4167b778722f9114583ad6b41faa83dd1508470be73d78d448354b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x52A4 9588 bytes
font_02_sfnt_off0000736c.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x736C 4324 bytes