Malicious PDF — malware analysis report

Static analysis result for SHA-256 2282e6465e0260d2…

MALICIOUS

PDF

42.3 KB Created: 2020-08-15 04:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc6c194feecdc14917dac2f8d3fa1977 SHA-1: eb30def472a2181f6735671613670d5c5b60009d SHA-256: 2282e6465e0260d256db805a5e9ca91609eda608d8c77467579ad528fe20dab3
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a PDF redirector link to 'ttraff.ru', which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL and text related to downloading an Instagram application, suggesting a social engineering lure. No scripts were extracted, but the primary attack vector appears to be the malicious 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=descargar+captivate+for+instagram+android
    • http://files.castsalmon.com/uploads/1/3/1/4/131437318/90b85d.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9273/files/93135473118.pdf
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/dewevujagojudojuposisutok.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/kudajubuvufobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/xumobenugit.pdf
    • https://cdn.shopify.com/s/files/1/0435/2308/0344/files/fejulopibedapudumagovuwoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/393514297.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdf
    • https://cdn.shopify.com/s/files/1/0431/1891/9837/files/chuyn_sang_jpg_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6981/files/95346326766.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
stream_003_off00005a14.bin
34a5c8bbad761dc987c92fe9e46fb575df3e9462eac0f1031fbfff412d8e0a17		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5A14 5292 bytes
font_01_sfnt_off00006bfd.bin
6a0ded437da27c193cdd897c1b0c329df6e7206a4fe53a40fad78812ece74494		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFD 10036 bytes
font_02_sfnt_off00008e5d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5D 4324 bytes

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