Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2fa92bec60e728…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 05:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d482e0850d433b317b2f8261bb51799 SHA-1: 4a44d55f080060178c1e3423c3c61179b44035f9 SHA-256: ec2fa92bec60e728079a651d38ddf6ebb95e5d9c851470d7346d9e6a3bdc2419
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/wix?keyword=download+web+page+html+android+mobil', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains text related to downloading web pages and mobile content, suggesting a lure. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm or content distribution strategy. 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=download+web+page+html+android+mobil
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/98475583701.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/77737617236.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4491/files/66281015944.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d6deec0ed734868ab6adadb3c7a2167.pdf
    • https://static.usrfiles.com/ugd/c1de29_eec22723cc5f4c4ea4c7e4c2a5547ff4.pdf
    • https://static.usrfiles.com/ugd/271e65_41cd5815a86b4ace9a0f804d87e0c508.pdf
    • https://static.usrfiles.com/ugd/b8c837_87d00bb687ca4e67b4ae52a38c2d35ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_d37f782aa0d8453083f83d42f24afbc5.pdf
    • https://static.usrfiles.com/ugd/837d34_36fcb2a634664ef18b1f2e922b2686ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_623b77815142466584cc69fe5b4dead3.pdf
    • https://static.usrfiles.com/ugd/b8c837_63d74fb18a554f81931d84a70dbeb211.pdf
    • https://static.usrfiles.com/ugd/b8c837_99fad0fd65e749edbd69c1ff0b3a1c86.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_off00005fc1.bin
6c85ad0d4795945649b77f333d6d9e29525f908fc2ad35a6776847b292d76152
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC1 5428 bytes
font_01_sfnt_off00007216.bin
0cfbbe313315d39cc64b4f33882caecbe916b18c47c9180c1382f93b37557b3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7216 10056 bytes