Malicious PDF — malware analysis report

Static analysis result for SHA-256 46dcd422065c607b…

MALICIOUS

PDF

65.3 KB Created: 2020-09-04 09:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9906c785b2108a263995e3bb4e2986ac SHA-1: 6520d2937b05ff9a2178bb31f76b1be042971c04 SHA-256: 46dcd422065c607bf3e73ee1404d872a7ac10ad63ec56f0365ba2fc490417c68
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=buku+tafsir+mimpi+togel+2d+bergambar'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect the user.

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.club/wix?keyword=buku+tafsir+mimpi+togel+2d+bergambar
    • https://static.usrfiles.com/ugd/ce5d00_b900cf20d25647af842c22b82bcb4ac5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ac644d0e1a149d2abea4b0a4a9dd6de.pdf
    • https://static.usrfiles.com/ugd/808d8c_957c31c8ac1849fdae43c47e8ee96746.pdf
    • https://static.usrfiles.com/ugd/8b49c6_4c6ed20e8a204438aa81d07ba69cad3f.pdf
    • https://static.usrfiles.com/ugd/7f46b5_ae61b01ae3bb42c1824be08b2f83d128.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5989/files/types_of_biomass_energy_sources.pdf
    • https://cdn.shopify.com/s/files/1/0438/2071/2098/files/action_research_proposal_format.pdf
    • https://cdn.shopify.com/s/files/1/0435/9372/8158/files/southwest_mobile_app.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/9368899543.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/80912010440.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/mutamejinigasoramufinileb.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d1f4062f4564fcf9ee63f59a0a84290.pdf
    • https://static.usrfiles.com/ugd/0c4177_8ee48e95f93a40778fb51fba15682cce.pdf
    • https://static.usrfiles.com/ugd/dd6616_8f428c919fbb48989ffd15f998a22548.pdf
    • https://static.usrfiles.com/ugd/96564c_08a8aca787bd4698927a021c01a2e863.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa16.bin
6081d2c07d0b9d64ef3dddc3d24b7a38216f734d72822a4b608a9b7fef5c3b2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA16 5524 bytes
font_01_sfnt_off0000bcdb.bin
d8dc87f62386ad6ff58b19e3e23681cec1a297ba98e3c5ea67be0feb9b59df6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDB 2212 bytes
font_02_sfnt_off0000c6f5.bin
c951fdbe86b9cab3f73d1766e28f51f186efaebc83eb1b566b183802f930d487		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F5 10076 bytes
font_03_sfnt_off0000e93e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE93E 4324 bytes

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