Malicious PDF — malware analysis report

Static analysis result for SHA-256 a474d618f0a82980…

MALICIOUS

PDF

45.4 KB Created: 2020-08-11 18:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6efe8e19119fcced2b765b5510e7028 SHA-1: a345c039211783f73e9a41d7d37631ab4d6e0e86 SHA-256: a474d618f0a829802c717a5006f65b8590cfc28321ba3e7e89ee1d5e3644febb
130 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which in turn points to a large number of PDFs hosted on Shopify. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious content. The presence of a 'download' button further supports the lure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=simplification+and+approximation+questions+for+bank+po+pdf+download.

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=simplification+and+approximation+questions+for+bank+po+pdf+download
    • http://vufugad.ptaccounting.net/uploads/1/3/2/6/132696323/wavulus_felariwawasi_vepubusakelilej_sitesumi.pdf
    • http://manote.yankee-woodworks.com/uploads/1/3/1/3/131382248/5325350.pdf
    • http://files.websitetemplatesdesign.com/uploads/1/3/0/9/130969297/kadixefuled-kivobotobaj-kepeburoxofoba-mamuwufor.pdf
    • http://files.dunainwoods.com/uploads/1/3/0/8/130814830/3274228.pdf
    • http://files.mjankauski.com/uploads/1/3/1/3/131384575/lowumavaxebalofekole.pdf
    • https://cdn.shopify.com/s/files/1/0436/5071/1705/files/sugidagegap.pdf
    • https://cdn.shopify.com/s/files/1/0440/1859/8038/files/nuvid.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/caliper_personality_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/3824/5017/files/xosujijikor.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/vibavowowobujelazigarasix.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/flamenco_guitar_lesson_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/2560/2472/files/87701277023.pdf
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/56388458740.pdf
    • https://cdn.shopify.com/s/files/1/0435/9186/0383/files/28245280695.pdf
    • https://cdn.shopify.com/s/files/1/0435/5604/4951/files/pajokuriramokumazuxuxu.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_off00006309.bin
9ae67fd689e877d3a39e338159ae3c0916ffcc8c52a21ebf655e9b0a64099ac7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6309 5776 bytes
font_01_sfnt_off0000768d.bin
989388fb8e88b6d5063a0e47df08c9bfa3d9964fdd7c36e56bdd48e052f7208a
pdf-font-stream PDF embedded font (sfnt) at offset 0x768D 10360 bytes
font_02_sfnt_off000099bc.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x99BC 4324 bytes