Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ac77b55dba4435…

MALICIOUS

PDF

51.7 KB Created: 2020-08-05 04:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9bddb39023f12f20c363beb36d4e558 SHA-1: 2d07fcca4b66ec88e33d97a2bcbb1761cef012b7 SHA-256: 47ac77b55dba4435a0577a522eb144980e55e4c95d7f31e2de21ffcee1f0bec8
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=aldehyde+ketone+and+carboxylic+acid+pdf+target'. While many links point to benign Shopify domains, the presence of the malicious redirector and the sheer volume of links suggest a malicious intent to drive traffic to potentially harmful 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.com/pify?keyword=aldehyde+ketone+and+carboxylic+acid+pdf+target
    • http://files.coffsharbourmusicalcomedycompany.com/uploads/1/3/0/7/130776158/8640042.pdf
    • http://files.haitiinternationalalliance.org/uploads/1/3/0/8/130873787/7100913.pdf
    • http://files.oatsandhoney.org/uploads/1/3/2/7/132740424/006f3.pdf
    • http://files.markthompson-artist.com/uploads/1/3/2/6/132695339/5879350.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/suxiperebe.pdf
    • https://cdn.shopify.com/s/files/1/0438/2988/7136/files/gatata.pdf
    • https://cdn.shopify.com/s/files/1/0438/2294/0320/files/capacity_conversion_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/suxurirelope.pdf
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/empty_bottles_yelawolf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5192/5155/files/4843007075.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/gojujagafowino.pdf
    • https://cdn.shopify.com/s/files/1/0431/3543/4901/files/zuxovubuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0808/files/27292544631.pdf
    • https://cdn.shopify.com/s/files/1/0428/3842/5767/files/58063019457.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwakuda.pdf
    • https://cdn.shopify.com/s/files/1/0428/5241/7703/files/kinuvizidetobo.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_off000089db.bin
96e352b820bf8e208ea41d3af9f53c339071105951af2bdaaf4c7904870ae642
pdf-font-stream PDF embedded font (sfnt) at offset 0x89DB 5600 bytes
font_01_sfnt_off00009cf0.bin
6abcdbfb72cb3d0db12c02951267a1cdea8190d99cdec47984537c139cac5200
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF0 10680 bytes