Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b24c36581cb8e2…

MALICIOUS

PDF

50.7 KB Created: 2020-09-01 06:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 990b832ea9a8207ca0e44558e3c7382a SHA-1: 24730b966efe6c8292b2d3c6bd780b1d23cea225 SHA-256: d5b24c36581cb8e2e88a5e5ac08fb18c0783ba71203fe550d3f967dbdc6844a3
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with multiple links pointing to redirector infrastructure. One critical heuristic identified a PDF link to known malicious redirector infrastructure at 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=design+portfolio+template+ppt', suggesting a lure related to design portfolio templates.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=design+portfolio+template+ppt
    • https://static.usrfiles.com/ugd/837d34_9bce5c8a4b83413aa77af312f27fd796.pdf
    • https://static.usrfiles.com/ugd/b8c837_de81def0044f4711a94fb8dd501c1da2.pdf
    • https://static.usrfiles.com/ugd/b8c837_413166dd6e904ee78e3076911b2f31fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc105667636b409cac439df943fa0c99.pdf
    • https://static.usrfiles.com/ugd/73cb9e_ac47864b91154c289817f5f87a1e2911.pdf
    • https://static.usrfiles.com/ugd/b8c837_df810c8a8ea2474b99aefa33e2dbe80d.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/kasuku.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/razekibedilovoretamibugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/sepukojirudinewose.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/29280678706.pdf
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/bosch_dishwasher_manual_reset.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/mcps_calendar_2020_19.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_off00007c34.bin
3ca70d6853fce853f39b46bd7f35b5b31b7f0bac6591ac015699a474ab264918		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C34 5008 bytes
font_01_sfnt_off00008d1a.bin
2436590c696b7b08df0a6e974aa335e97675c1089b775de206ba615bf5ed9936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1A 10128 bytes
font_02_sfnt_off0000afbf.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFBF 4324 bytes

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