Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42e1acde81968d3…

MALICIOUS

PDF

41.7 KB Created: 2020-09-08 00:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9adc142f507a8a5dee8ce6e82fa6c8d SHA-1: bcfe8f8ad3c53061512f8d6a876821ae13ac84eb SHA-256: e42e1acde81968d3950a11be4da5b63f55bc73413a60ac6083ca443febbca394
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 'ttraff.club'. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking PDF links, suggesting a lure to trick users into clicking the malicious link. 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.club/wix?keyword=dreams+and+nightmares+lil+peep
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/patojedu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6317/2502/files/church_of_england_baptism_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/nugejobotekawefetodolager.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/wisofeva.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/zobavako.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7271/files/57691382117.pdf
    • https://cdn.shopify.com/s/files/1/0429/2024/7462/files/weekly_menu_planner_template_free.pdf
    • https://static.usrfiles.com/ugd/4d400c_8f4cdae0f5524e7aab3a6d68b2fbc4a2.pdf
    • https://static.usrfiles.com/ugd/89441e_3dbc1d153578461dbc9e2cba7f676cd1.pdf
    • https://static.usrfiles.com/ugd/7e6083_16408453f80e43d385749e1be3e63ca4.pdf
    • https://cdn.shopify.com/s/files/1/0440/9029/4437/files/89199872251.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/ca_form_568_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/fesosotolisigixuzamut.pdf
    • https://cdn.shopify.com/s/files/1/0434/3745/7575/files/pedobafu.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_off00006205.bin
7066e0a013988f129449863fd58c47167ebd2d42d837150779b1b62a8891dafd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6205 5372 bytes
font_01_sfnt_off00007422.bin
9556cd22393ac417c52d9175e0f785fb59972a5aac1a3fc455d9010538d0c889
pdf-font-stream PDF embedded font (sfnt) at offset 0x7422 11468 bytes