Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd67fadaf98fb62c…

MALICIOUS

PDF

35.6 KB Created: 2020-08-15 02:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd474d8aa22ca9a183e532a5a33154c2 SHA-1: 66c7d01305b1f27191b736048a796a4e05ce3926 SHA-256: cd67fadaf98fb62c480aa7c200e4c9594771a14b13e7b485d4a6c81b883dfb6c
128 Risk Score

Malware Insights

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

The PDF contains a lure related to a 'deepest sympathy card template' and embeds multiple links. One of these links, 'https://ttraff.com/pify?keyword=deepest+sympathy+card+template', is identified as a malicious redirector. The document also features a large number of links to Shopify domains, many of which appear to be part of a link farm, with some pointing to benign PDF files and others to unknown destinations. The presence of a malicious redirector and the link farm suggest an attempt to lead the user to malicious content, potentially for phishing or malware distribution.

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=deepest+sympathy+card+template
    • http://files.garethworthington.com/uploads/1/3/0/7/130776757/d26288238b6.pdf
    • https://cdn.shopify.com/s/files/1/0437/6133/6471/files/how_to_overcome_cultural_barriers_in_communication.pdf
    • https://cdn.shopify.com/s/files/1/0429/5101/6601/files/labufurikadulival.pdf
    • https://cdn.shopify.com/s/files/1/0436/9081/9739/files/sogifovonu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/1984_niv_bible.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/water_pollution_in_bengali_language.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2093/files/30967417189.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/48331907742.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/putesozuba.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/bush_francis_catatonia_scale_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6172/2788/files/sodoluvojewumax.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_off00004e00.bin
39f55a5d5399f9a429a5f3d8bca09b2795e7e71efe455bd35969b4cf18a6b8c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E00 5416 bytes
font_01_sfnt_off00006043.bin
868d8a617bb37c0d82166ee554e539aef1e3989d581a7281cbf590171f00cb6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 9956 bytes

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