Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fddf48d070221d…

MALICIOUS

PDF

35.8 KB Created: 2020-08-11 08:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6827dc6f9189f644d6fcf8b7a418d12d SHA-1: 2ee5d0f8591161a1eea97caafe6dd9798a2cf88b SHA-256: e7fddf48d070221dfe46450a674852e703fbc0341b9478bdd2f07785bb84c13f
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, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=big+ideas+math+geometry+pdf+chapter+1'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify and other domains, suggesting a link farm or redirection scheme designed to lead users to malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=big+ideas+math+geometry+pdf+chapter+1
    • http://wibawi.stpiusinprint.co.uk/uploads/1/3/1/3/131383297/bitowoxefoguf_bidijavabuvapiz.pdf
    • http://fefodazo.meadowsoflaurelwood.com/uploads/1/3/2/7/132740720/virulivevinobedirix.pdf
    • http://files.australiancyclingteam.com/uploads/1/3/2/7/132712093/momizanivug.pdf
    • http://fivenulid.kovanis.com/uploads/1/3/1/3/131380213/7b74a6bcb4b65.pdf
    • http://files.ashagarrattmakeupartistry.com/uploads/1/3/0/7/130739517/7b6ddf451ef88.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/nested_list_weight_sum.pdf
    • https://cdn.shopify.com/s/files/1/0437/0612/2393/files/tuvulus.pdf
    • https://cdn.shopify.com/s/files/1/0429/1500/4582/files/35615586329.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7519/files/pilofamibetadotijoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6810/4602/files/mapupaxaxuwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/zirizagidobo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/84316063848.pdf
    • https://cdn.shopify.com/s/files/1/0438/7205/9547/files/lebanefor.pdf
    • https://cdn.shopify.com/s/files/1/0437/5710/9402/files/fiwumomasawo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5431/6197/files/32518987094.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/58848619693.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_off00004c9f.bin
5a1ac48b3e29a4b0fe7b6a9d9f7216a42497fde675922ed9ba403034c8dd8091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C9F 5740 bytes
font_01_sfnt_off00006011.bin
6b9d90d85227bd3fd6c2cb598724611b58ffa2528e98139acdffe74a4fb105c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6011 9912 bytes

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