Malicious PDF — malware analysis report

Static analysis result for SHA-256 465c40132bcb5106…

MALICIOUS

PDF

40.6 KB Created: 2020-08-25 01:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9d22589532906feefd5a85a665da042 SHA-1: 68e05055153d8dc73844f42b379e2ed5756a7e46 SHA-256: 465c40132bcb5106d5f0205e59d596a89f49ee78770d31bf5bcb14c704ab429b
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 Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for movie theme music, likely to trick users into clicking the embedded links.

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/pify?keyword=sketch+movie+theme+music
    • http://files.alexjoll.biz/uploads/1/3/1/1/131164419/8198504.pdf
    • http://lipumid.irnawards.co.uk/uploads/1/3/2/6/132683014/1574035.pdf
    • https://cdn.shopify.com/s/files/1/0434/1723/9704/files/gubaxokinarumijofabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4572/4055/files/sabusalawisutumidolal.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0942/files/12083305717.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/jagamewatimexiwofemuxosax.pdf
    • https://cdn.shopify.com/s/files/1/0432/6070/6971/files/shading_3d_forms_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5270/files/yokai_watch_world_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/verirabuvumiditeru.pdf
    • https://cdn.shopify.com/s/files/1/0433/2804/5209/files/alesis_quadraverb_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/restaurant_billing_system_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/wonewobatujiwamunef.pdf
    • https://cdn.shopify.com/s/files/1/0435/4578/8584/files/43733143394.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/47660467690.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_off000049df.bin
c1e29624c8357304d69eee17e0ccb1fb4173b7e522db37fb716231603bd57da9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49DF 4928 bytes
font_01_sfnt_off00005a8b.bin
231cc82e5311d221a02dfc7cdb34a9b02d877d9f3227936bfa7dbfc7d8f4c12b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8B 3480 bytes
font_02_sfnt_off00006785.bin
67fbb597326033b791135a5e96d2d2a4145ba25fc64ec02bb84e77248dbee1f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6785 14208 bytes

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