Malicious PDF — malware analysis report

Static analysis result for SHA-256 0312881433d4a35c…

MALICIOUS

PDF

44.6 KB Created: 2020-08-21 21:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85be0106d469ab87997bfcd24dd78b34 SHA-1: 185a1abf7e24949e8a9f00b2d9a147f539210aff SHA-256: 0312881433d4a35cc587efc365980875afdac9ea8d316a00c512384732611977
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, indicating an attempt to direct the user to a potentially harmful site.

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.com/pify?keyword=blame+movie++300mb
    • http://sazozo.geirthewriter.com/uploads/1/3/1/3/131398020/7859487.pdf
    • http://files.carolinelosneck.com/uploads/1/3/0/8/130874284/fanajafobav-kemisevugan-lewajo-pigan.pdf
    • http://files.simonesoernsen.com/uploads/1/3/1/3/131383514/c9d5b8fa8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2199/1079/files/building_construction_company_profile_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/62396323567.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0610/files/fegopisewiriko.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/35554471540.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/23093349354.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/seremuganosewaputalonuret.pdf
    • https://cdn.shopify.com/s/files/1/0429/3338/7423/files/faa_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0430/4463/4773/files/fekerakugevuv.pdf
    • https://cdn.shopify.com/s/files/1/0450/4561/2694/files/solitaire_board_game_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/4618/2822/files/92700426126.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/96400104414.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/programming_language_tutorial.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_off0000705d.bin
a6faf9435f163bca2c7a4c89a49788caeda39a554ceddf88807500db9a221f3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x705D 5112 bytes
font_01_sfnt_off000081b9.bin
f81610e30cb4bb35ffd9fc0bebcfaf6fd415cfe9b8c6747b36887f40214301a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x81B9 10548 bytes