Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0704f6ca6f59bc5…

MALICIOUS

PDF

47.3 KB Created: 2020-08-30 07:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c772f27820a75bda0561f274e846a572 SHA-1: 77c0196abb6008c6aaee1460e5e63f9b8ca28840 SHA-256: e0704f6ca6f59bc5617c32aed8e6def93e522b24726c4779a565cd3387fcec42
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://ttraff.com/wix?keyword=display+1602a+datasheet', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'display 1602a datasheet' and the authoring application, suggesting a lure to disguise the malicious link farm. The ML classifier also strongly indicated maliciousness.

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=display+1602a+datasheet
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/mumotojofa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/52057789030.pdf
    • https://cdn.shopify.com/s/files/1/0460/9107/5748/files/learn_to_speak_enochian.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/nelisagupufujivi.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b917008ad8f4dde98ca2745c40b2371.pdf
    • https://static.usrfiles.com/ugd/b8c837_579b58be6a204ab0a0a1d737762d1c45.pdf
    • https://cdn.shopify.com/s/files/1/0460/1436/5855/files/tisexozu.pdf
    • https://cdn.shopify.com/s/files/1/0451/9873/7559/files/beowulf_an_anglo_saxon_epic_poem.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/lawulakeveribo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6437/8022/files/46289446331.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5391/files/15594254397.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/9634784958.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/management_of_afib_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/7119/2732/files/23083405681.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_off0000640f.bin
91bdc622dde46fb1118285baa051160133af0d8f5e0b297de4b35c26e1e1a543
pdf-font-stream PDF embedded font (sfnt) at offset 0x640F 5532 bytes
font_01_sfnt_off000076db.bin
461c196ee2f77bd2d5e5f75a4c036732c4ac5559acce557d975e46f303218a34
pdf-font-stream PDF embedded font (sfnt) at offset 0x76DB 10712 bytes
font_02_sfnt_off00009bb1.bin
0bae8649ba252bcfab81cb8324cfe1737d73e47191b507e117e6d0858e0066a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB1 16028 bytes