Malicious PDF — malware analysis report

Static analysis result for SHA-256 439fa9d5b4719a66…

MALICIOUS

PDF

43.9 KB Created: 2020-08-14 10:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5599ccae59adc1248eb05757a0f2f5a5 SHA-1: 94044f8c76efae98aee0dab07e056dc82af0b513 SHA-256: 439fa9d5b4719a66f71cd3b21abde6626faa806959b47c9d319176820aa8a170
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though partially corrupted, contains text suggesting it's a calendar or related to downloads, and the presence of a 'Download Now' lure further supports a deceptive intent. The primary malicious URL identified is https://ttraff.cc/pify?keyword=cfisd+calendar+2017-+18+pdf, which likely serves as a gateway to further malicious content.

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.cc/pify?keyword=cfisd+calendar+2017-+18+pdf
    • http://nevarat.gcfchappell.org/uploads/1/3/1/6/131636725/gidivofu-movedajazufel-linaj-jizokina.pdf
    • http://vomag.pcgeeksonthego.com/uploads/1/3/1/4/131407370/ca45fb66ce02d.pdf
    • http://zigaxux.scsoaventura.com/uploads/1/3/0/9/130968917/c0b28bc8eab.pdf
    • http://files.caveiraphotography.com/uploads/1/3/2/6/132681836/lapireru.pdf
    • https://cdn.shopify.com/s/files/1/0450/6569/9478/files/backpack_mod_minecraft_1._7._10.pdf
    • https://cdn.shopify.com/s/files/1/0437/3856/2712/files/73853045143.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/dafujubajevagenixamol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41267837863.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5734/files/tibofokudamelenigeroxole.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/badew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/83029094943.pdf
    • https://cdn.shopify.com/s/files/1/0440/7400/8741/files/how_to_remove_xbox_game_bar.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9943/files/laperalopexavagabex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/12488946566.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
font_00_sfnt_off00005de8.bin
97d2e6a41d4620d6b778552c8d072436182b8186b877d4da3d132308a8d94a47
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE8 5404 bytes
font_01_sfnt_off00007053.bin
86d3a744c4ab429b3b43e9cd61d3a58b759180e53f24665bf7a4bc7034b6856b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7053 10676 bytes
font_02_sfnt_off000094e3.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x94E3 4324 bytes