Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d42a4adb49fc21…

MALICIOUS

PDF

45.5 KB Created: 2020-07-24 07:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dd83d14beaf8a923dc4d2fc3454384b SHA-1: a28869d1c37bd5b0daa20aadfd9dc9d9db9be82f SHA-256: 39d42a4adb49fc21e9813c6b9ca1f36471af545862cacc2e1f609f9045f8b089
120 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, with many pointing to Shopify domains and one specifically to a known malicious redirector at 'ttraff.ru'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large collection of external links, suggesting an attempt to manipulate search results or distribute malicious content through a link farm. The document body is heavily obfuscated and does not provide clear textual lures.

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=android+xml+tools+namespace
    • http://files.francescagracenutrition.com/uploads/1/3/0/7/130775715/minemilejen_zimufuk_tugilotis.pdf
    • http://files.plantmorenatives.com/uploads/1/3/0/7/130775200/gusolupelodoj.pdf
    • http://files.carloshoyt.com/uploads/1/3/1/4/131408369/606ec1573.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/nisizim.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/zasoxitojirezizidisuroxep.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6435/files/debovukakikakudab.pdf
    • https://cdn.shopify.com/s/files/1/0429/5901/2006/files/22709746695.pdf
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/59837697862.pdf
    • https://cdn.shopify.com/s/files/1/0430/8303/8874/files/47628786933.pdf
    • https://cdn.shopify.com/s/files/1/0439/0223/8888/files/tusiwerosusudelidesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/62350985805.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53446206952.pdf
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/xegoviwabeneloxuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9525543421.pdf
    • https://cdn.shopify.com/s/files/1/0435/6227/0879/files/45456930221.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/disexolaniwekejevubiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70745323757.pdf
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/95080084966.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/
    • https://cdn.shopify.com/s/files/1/0

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007158.bin
f2e38cb7e5962a3a51bba1b920f6ba47df3d2e25cfa480781858e067642b9fc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7158 5064 bytes
font_01_sfnt_off0000826a.bin
3786bea0b25c7084ca0caed930b36d6df309fdaacc87a7dbf33c959c6b8c055a
pdf-font-stream PDF embedded font (sfnt) at offset 0x826A 11548 bytes