Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c937af924946535…

MALICIOUS

PDF

40.7 KB Created: 2020-08-11 09:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89f77a19c3a866fa38928ffd0a09a77f SHA-1: c6d123b8af35867fa45a0aac2c40fbcf60d5f66d SHA-256: 1c937af9249465353ccc492d50e750a8750074542cd0bcadb4cec32bc29d1972
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for learning guitar. The document body, though heavily obfuscated, contains the same URL and other URLs hosted on Shopify, suggesting a link farm or redirection strategy. The primary malicious URL is ttraff.ru, which is known for redirecting to malicious content. The PDF also contains a large number of embedded links, indicating a link farm strategy.

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/pify?keyword=aprende+ya+a+tocar+guitarra+pdf
    • http://files.ftcyouth.com/uploads/1/3/1/0/131070393/siluwerufimebob.pdf
    • http://kekomi.tracelearningcenter.com/uploads/1/3/1/6/131606289/koxozezeli.pdf
    • http://files.greaterlouisvillechapteraacn.org/uploads/1/3/0/7/130739802/84598689d4.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/zetivaxonuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/ncert_science_class_6.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2370/files/angularjs_read.pdf
    • https://cdn.shopify.com/s/files/1/0437/5366/8769/files/pi_in_hex.pdf
    • https://cdn.shopify.com/s/files/1/0428/8181/0595/files/tawopozadofevodesezew.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/safox.pdf
    • https://cdn.shopify.com/s/files/1/0429/8938/7939/files/lafiseloza.pdf
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/kegilat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/gedijanasupaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/blossoms_of_the_savanna.pdf
    • https://cdn.shopify.com/s/files/1/0438/1802/5117/files/alter_ego_b1_corriges.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.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_off00005df5.bin
6aed666652ffb4fbaf5fd2c4099afed7016aded8b0fda2544ca390590d780709		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF5 5204 bytes
font_01_sfnt_off00006fc1.bin
7dd74156586428e92ec7329108dfbc4eaba550ce951d0ffd0d0a5e770dcf7bb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC1 11292 bytes

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