Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1dc83f0c334e4c8…

MALICIOUS

PDF

38.8 KB Created: 2020-08-19 22:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ad73e768e572bced57ca231a3c4f4d3 SHA-1: e7e928e5ba4cb58cbf0b16d61c0f7b93d994ee3e SHA-256: b1dc83f0c334e4c896abf4a67f77c02fc4d8927cf8732111b7bf2778b5a249ed
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, a common tactic for SEO poisoning or link farming to distribute malicious content. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=ms+office+2016+32+bit', suggesting an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains references to software downloads, reinforcing the 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.cc/pify?keyword=ms+office+2016+32+bit
    • http://pupuga.runningcrazyforever.com/uploads/1/3/0/7/130775413/gosalere.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/tovujif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22271122494.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2781/files/33847699372.pdf
    • https://cdn.shopify.com/s/files/1/0462/2925/8389/files/367688361.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/ginuxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4179/9843/files/cadsofttools_to_dwg_software.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2374/files/pidoranutem.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6630/files/dofus.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/exercises_present_simple_1o_eso.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6168/files/icao_iata_airport_codes.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_off00005a6d.bin
daebad6980fa6272910d630aca66dd9762d87b5ba2dc305568249ca6b85d0664		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6D 5324 bytes
font_01_sfnt_off00006cb1.bin
b2ef514112eec1856e2521c9fa4ea352cce00e3b607dbc68157702f9e03051d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB1 9944 bytes

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