Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ba9487181db9e2…

MALICIOUS

PDF

45.2 KB Created: 2020-07-27 16:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70aeaef503e22a7ddaae5c7406ae7aad SHA-1: 893ee8c143cda8ed178648db8a574052bafb4cc8 SHA-256: 25ba9487181db9e208d20b53f965e04fefdf6e5ec6df15aa6f11e348d4ccd4b6
120 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDF files. The primary malicious link redirects to a URL that appears to be a link farm, offering a download for 'Aida64 extreme edition portable'. This suggests a social engineering tactic to trick users into downloading malware disguised as legitimate software. The PDF structure and link farm indicate a delivery mechanism for potentially unwanted or malicious software.

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.ru/pify?keyword=aida64+extreme+edition+portable
    • http://files.maggiejoynt.com/uploads/1/3/1/4/131453007/tipug.pdf
    • http://files.margaretmcgillivray.com/uploads/1/3/0/7/130739542/630320.pdf
    • http://files.amandasunshinewilliams.com/uploads/1/3/1/3/131380251/4a6da47.pdf
    • http://files.margaretmcgillivray.com/uploads/1/3/0/7/13073954
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nadogenomaxijedunebenez.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/koravakikuwit.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1911/files/wuriwir.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/mamabaxetajoteru.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/xuziruvikal.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/pumegexaxegor.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/821442328.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/gogigedoji.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/72501019443.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4615/files/78155993067.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_off00006cf8.bin
9db32f6fa719d27b2d6ff608ac0281cbf19aaf9ef093b193eb5439316ee24554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF8 5156 bytes
font_01_sfnt_off00007e58.bin
c121958dc983bebade2d1a2b9fae51ed940b647ebca638dd9b6e00d0a0b3e92a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E58 15136 bytes

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