Malicious PDF — malware analysis report

Static analysis result for SHA-256 98985ef5902955d0…

MALICIOUS

PDF

69.1 KB Created: 2020-07-30 23:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aeac6ded22fcb91b1069c592d811566 SHA-1: 14fb73fb54350005b26ec42c90f50c187e2c93bd SHA-256: 98985ef5902955d0da856f6d5b7d6dc34a29eb30aa77a197bf3af642ec7f5fdf
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. One of the primary URLs points to 'ttraff.ru', a known malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of a link farm heuristic further supports the malicious redirection attempt. The overall pattern suggests a phishing or scam lure.

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=winnie+the+pooh+script+pdf
    • http://files.sbcusd-career-pathways.com/uploads/1/3/0/8/130874058/simubewefuji-sexanere-vumaroti.pdf
    • http://files.bcbsca.org/uploads/1/3/2/6/132682685/5772793.pdf
    • http://files.bettercapsonline.com/uploads/1/3/1/4/131453598/1d8e94ad.pdf
    • http://files.cristianamente.org/uploads/1/3/0/7/130739524/5681599.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/kokigulugarav.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/sotofojuraduxarekalus.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5354/files/25330095120.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/35073102227.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdf
    • https://cdn.shopify.com/s/files/1/0433/1424/9886/files/noxogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/34093464328.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/82173035859.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/rabixusegujil.pdf
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/41187636813.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nezax.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_off0000d2dc.bin
0d03b6e2c37668ff64671fe5147cd578bd5159f92a7cd89c7fb8bc07e275e464		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DC 4800 bytes
font_01_sfnt_off0000e32b.bin
ca9b20a21ce33fa2c9c5831dd6df640366b515ea15dbfbe6380d12768cc313f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE32B 10580 bytes

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