Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd42e7f151f064a…

MALICIOUS

PDF

45.6 KB Created: 2020-08-31 04:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bbecebc69d3ce0b8fc7b2c8853053c8 SHA-1: 1a7ff087207d6c39bf7e3f29b25680a85ef01336 SHA-256: abd42e7f151f064a55f4c275f8dbfbba508c0af8b35db0bb8bb9267fa402b253
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/wix?keyword=wiz+khalifa+28+grams+torrent'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign content, likely to mask the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=wiz+khalifa+28+grams+torrent
    • https://static.usrfiles.com/ugd/5de1df_4036f59045034baca61f59de436ad812.pdf
    • https://static.usrfiles.com/ugd/3bf302_5300164b8bac4cd692b70489413dac17.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b8f1a4400a3422b8909dc1a4f0ee5ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_391fd59f4b0c47a599bb0c94c1874c0b.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/list_of_marvel_tv_shows.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/lpg_bottling_plant_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/46641539211.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://static.usrfiles.com/ugd/b3bc21_49646ff11f3e471da6d72f8d45b7bbc0.pdf
    • https://static.usrfiles.com/ugd/a2e20a_d2c48bbd4b2a47298c6a07788fad225a.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/judy_bartkowiak.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9309/files/autocad_3d_import.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/tatudowevuwulabedozolu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/33319314822.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_off000059b6.bin
3ce3cc23aabac89bd8594e51b5f4facd6fe2fd803b351cb451a9788bdb1462fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x59B6 5424 bytes
font_01_sfnt_off00006c02.bin
e0a83c6e5f597ae69c87d6ff413ca206a12a8f08a2eb72076c80531665425cbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C02 15048 bytes
font_02_sfnt_off00009b51.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B51 4324 bytes