Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc06b9b404d6996d…

MALICIOUS

PDF

117.4 KB Created: 2020-08-31 06:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ed09fd8004249acf01116453d6cfcc5 SHA-1: 45c15c01d836d12756eb45385bf54bf8a2ac6988 SHA-256: cc06b9b404d6996d28f58f12e0e66459831ebc1cedfb4ab83d44e21c97d42f9f
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 pointing to 'https://ttraff.com/wix?keyword=ley+general+de+educaci%25C3%25B3n'. Additionally, another critical heuristic indicates the PDF hosts a link farm with numerous external PDF links, suggesting a coordinated effort to distribute malicious content. The ML classifier also 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=ley+general+de+educaci%25C3%25B3n
    • https://static.usrfiles.com/ugd/a01749_0bc604ffe7d94d19b35365a4904ba7ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_527e1dd520674f53a0cf9c4579a140c3.pdf
    • https://static.usrfiles.com/ugd/8ba634_64646cca6a214a6dac07b7ff4f644ba8.pdf
    • https://static.usrfiles.com/ugd/76de1a_b9c2dcfdc9074adf8a13269af0fe239d.pdf
    • https://static.usrfiles.com/ugd/b8c837_63f9f500c42244b78287e1844a08accb.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/wulejiduwokoligodofaxej.pdf
    • https://cdn.shopify.com/s/files/1/0440/5847/6694/files/creating_equivalent_ratios_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0447/1137/9097/files/69112873916.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/blue_prism_developer_certification_dumps.pdf
    • https://cdn.shopify.com/s/files/1/0436/9268/7513/files/53324537643.pdf
    • https://static.usrfiles.com/ugd/003b86_23a229b353f440ad8b04d7e013512efa.pdf
    • https://static.usrfiles.com/ugd/80bfa9_f9d2a74d3cb04b489e6639a5e820028a.pdf
    • https://static.usrfiles.com/ugd/d902bb_028bc5d7091041408b01c1721cde2f5e.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5146/files/82320313228.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/86247359138.pdf
    • https://cdn.shopify.com/s/files/1/0438/1632/1184/files/50876424315.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_off0001900c.bin
6236ac1bdfff680219eb90e2ca15186372a214fa21e900c4291f433fdbe2e476
pdf-font-stream PDF embedded font (sfnt) at offset 0x1900C 5108 bytes
font_01_sfnt_off0001a13c.bin
367e131a935424eb4f804a22199eb5fcc1d12ea344610543ab37f589708a4885
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A13C 11676 bytes