Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6a36d5b3fee77f…

MALICIOUS

PDF

38.9 KB Created: 2020-09-13 02:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03469fc288a1e1732f1d2d842fde6263 SHA-1: 8a7fa8778c4f38af7286dcb811bf668a3c4c5dcb SHA-256: 4e6a36d5b3fee77faed228b76fb4b7540810b7496b52d2fbddbe647c7c6ec0f8
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body text, though heavily obfuscated, contains references to 'unblocked games bmx' and a URL that aligns with the malicious redirector. This suggests a social engineering attempt to drive traffic to malicious sites, likely for further exploitation or malware delivery.

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.link/wix?keyword=unblocked+games+bmx
    • http://rejized.drjuliannavalearningacademy.com/uploads/1/3/1/6/131607062/2655360.pdf
    • http://lowatevo.yanka-online.com/uploads/1/3/1/4/131483068/sobamumiwumol.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/publisher_booklet_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/7784/2582/files/noxulixib.pdf
    • https://cdn.shopify.com/s/files/1/0463/2805/3915/files/worm_dissection_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/limitawerixodu.pdf
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/movupikejekutudox.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/ninoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/aradhana_malayalam_movie_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/nodikivuludatovifuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/59517292455.pdf
    • https://static.usrfiles.com/ugd/90d19e_2db70e939f6d40f4b1ea95cd408cbe1f.pdf
    • https://static.usrfiles.com/ugd/191a6d_71d11e994c984f20a4267a09896c92b0.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_off000056c0.bin
3d4b2c092f1bbf73421043afa534f908cc2742d0b75e59cc2dd069fbc1c2bbb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56C0 5428 bytes
font_01_sfnt_off0000692c.bin
95f106dd0294ad9163a2e5ff82bd833d3b0fb7f19c5cf146b946d33ace538cdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x692C 11708 bytes

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