Malicious PDF — malware analysis report

Static analysis result for SHA-256 524f6372dc67a00d…

MALICIOUS

PDF

46.5 KB Created: 2020-08-31 05:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3f1b0f5a9f87559c7be9f72a46338b6 SHA-1: 8786799e88afd48a231f39165a8ba7a43ea370b3 SHA-256: 524f6372dc67a00dcd83f5c4f0082337df95d626288373efab00cb3de27116c4
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure. The presence of a large number of embedded PDF links, many pointing to Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the final destination.

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.ru/wix?keyword=talks+at+google+value+investing
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/kijinip.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/free_printable_christmas_flyer_templates_word.pdf
    • https://cdn.shopify.com/s/files/1/0466/3869/4565/files/cambridge_ielts_11_general_training.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/farenigokixelidunodixe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5397/files/lezun.pdf
    • https://static.usrfiles.com/ugd/9e53d4_2e1a569495e2460abaf5a648d3288276.pdf
    • https://static.usrfiles.com/ugd/9c43ec_82858ad9a4954349bece049507421068.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/movefipininuxixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8275/1893/files/lutajivipekiwebixijukabip.pdf
    • https://cdn.shopify.com/s/files/1/0440/5395/4725/files/jax_beach_surf_report_for_tomorrow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0429/0517/4183/files/60042785216.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_off000077f2.bin
792e1ace311d59a9ac3504ad22e289587fd58523048e342cff8b5d08e9a98f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F2 4832 bytes
font_01_sfnt_off00008883.bin
92512b592e0ecad1b2da85efe606465e1134d2037bc6a1e6424ff91c128dcdbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8883 10860 bytes

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