Malicious PDF — malware analysis report

Static analysis result for SHA-256 91936cdde92a5c00…

MALICIOUS

PDF

62.8 KB Created: 2020-08-29 21:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 831ff2ad83b42ae8b4d5dd6e7a2a3c68 SHA-1: efec570c8eb33e9c37c145f3377514ced4c16ce5 SHA-256: 91936cdde92a5c00b7fafead0e6c49a445dacd82ce124d7e5ebdeabf36185e46
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=oxford+read+and+discover+all+about+space+pdf'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of a link farm heuristic further suggests this PDF is part of a broader campaign to drive traffic to potentially harmful destinations.

Heuristics 3

  • 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.
  • 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.cc/wix?keyword=oxford+read+and+discover+all+about+space+pdf
    • https://static.usrfiles.com/ugd/b8c837_38d88a5e05be4ae1b94398722fe55f31.pdf
    • https://static.usrfiles.com/ugd/b8c837_53ed3c5fc2ae476893ca132eca976b80.pdf
    • https://static.usrfiles.com/ugd/b91566_a45dd1f1c87c49588e45e0a28c890663.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/bebisuranejiji.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/is_11255_part_2.pdf
    • https://cdn.shopify.com/s/files/1/0439/2694/5947/files/college_physics_serway_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/4407/7722/files/vanewifetejazu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/62033321483.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/71263843783.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/atualidades_2020_em.pdf
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/sadalatinewibakej.pdf
    • https://cdn.shopify.com/s/files/1/0433/7998/2492/files/sexegabetanor.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1214/files/48943178644.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3fd023897294987986df00c7fe39778.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb6451e830434a869b0256e0a060551a.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_off0000b7ad.bin
ce21b018469b521c8b57e952d66df75348535d746b07098756c95288cdb9dc15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7AD 5444 bytes
font_01_sfnt_off0000ca43.bin
f63beed4f390066ade689ad699cadfa7480c31c7a8adb9872ee1924795498484		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA43 10736 bytes

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