Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b5141317f5a52f…

MALICIOUS

PDF

42.4 KB Created: 2020-09-01 06:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc8887ca6b1a644a638f4c9c24c8e14c SHA-1: eea87d230086edbb1a53d0a436ed454450c20ff1 SHA-256: b3b5141317f5a52f0c1b82c8b03fb6627d384b724338a1a20253128c2d98fd9b
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of outbound links, many hosted on cdn.shopify.com, suggesting a link farm designed to attract traffic. The document body contains a call-to-action phrase, aligning with the SE_DOWNLOAD_BUTTON heuristic, and the primary malicious URL is ttraff.ru, which is flagged as a redirector.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=software+mp+navigator+canon+lide+100
    • https://cdn.shopify.com/s/files/1/0439/5591/2862/files/13006350596.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9288/files/78199282874.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/darulifipisitukezipidub.pdf
    • https://static.usrfiles.com/ugd/c0b427_8251016a81704f0db3d83180fc3c91ba.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/ridov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11286786524.pdf
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/vovuxopixubigupelumig.pdf
    • https://cdn.shopify.com/s/files/1/0438/1212/6880/files/cardview_dependencies_in_android.pdf
    • https://cdn.shopify.com/s/files/1/0450/2175/7590/files/imagenes_cristianas_para_colorear.pdf
    • https://cdn.shopify.com/s/files/1/0449/5713/9103/files/91393632800.pdf
    • https://cdn.shopify.com/s/files/1/0436/7787/6377/files/entergy_power_outage_report.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_off0000639d.bin
6e85151ef21af4b79226d142b74f79fdc2e7e6a5caffa15d0e9603eedc25336b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 5744 bytes
font_01_sfnt_off0000773f.bin
eca1657358c271280889de0c35644079a9c396dfdc6c6db400cd881c7e3dae5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773F 11552 bytes

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