Malicious PDF — malware analysis report

Static analysis result for SHA-256 addf23b5ae6c54b1…

MALICIOUS

PDF

43.0 KB Created: 2020-08-08 11:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a8f5d5e8303bbbffb2a3310875c7893 SHA-1: e328ee6a1407f11bbfa05e5f0dca1775488364f1 SHA-256: addf23b5ae6c54b189dfe001bccadff39e1d594066ba3d54be8a5fb079fb95f8
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=best+app+for+pdf+annotation+mac'. This link is presented within the document body, suggesting a social engineering lure to trick users into clicking it. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=best+app+for+pdf+annotation+mac
    • http://files.thewholechildmatters.com/uploads/1/3/1/3/131378776/busixed.pdf
    • http://files.connectingcommunities.com.au/uploads/1/3/0/8/130814245/be674e451f228b.pdf
    • http://files.iosociety.org/uploads/1/3/1/3/131383750/33acbbc.pdf
    • http://files.mojirestaurant.com/uploads/1/3/1/4/131453284/1209058.pdf
    • http://gokow.yourfitnesschloeshea.com/uploads/1/3/0/8/130874359/kegugov_zepojofakemomen_nemevon.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/27975059720.pdf
    • https://cdn.shopify.com/s/files/1/0435/2809/3856/files/devuvasetapagiveraraxeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/7824/6815/files/83376260850.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/57296252150.pdf
    • https://cdn.shopify.com/s/files/1/0430/9925/9031/files/66595634006.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/a_level_mathematics_statistics_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/8474/9729/files/electronics_and_communication_engineering_projects_for_final_year.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/nijovisaxonelexiwam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/3122934735.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_off00006b18.bin
00839c70ed0d3faf9ced283325b2dc236d6d07ecc7124fb2636c5548b11ce79a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B18 5320 bytes
font_01_sfnt_off00007d1d.bin
0b1cab9d83e7ca0385f441095385ba7bc70627fba75577f0f690cb977c53d9fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1D 10044 bytes

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