Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eafa105f320dcda…

MALICIOUS

PDF

40.7 KB Created: 2020-07-30 20:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52a844118b4da0d8e2908a5044bbe224 SHA-1: 1492aedd351d8aec6b243820e015f93fed6ace55 SHA-256: 7eafa105f320dcda0645ec2a6b397260da3b495937cbcc73f0129fdb93886e6b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=annabel+lee+multiple+choice+questions+pdf'. The document body, though heavily obfuscated, appears to be a lure related to 'annabel lee multiple choice questions pdf'. The presence of numerous Shopify-hosted PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=annabel+lee+multiple+choice+questions+pdf
    • http://files.ataactx.com/uploads/1/3/1/4/131483400/2025e12c466640.pdf
    • http://files.camillefrancois.com/uploads/1/3/0/9/130969148/c3e02.pdf
    • http://files.creedlab.org/uploads/1/3/0/7/130739766/6c8c412671472.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/dugasibufazolewamumapez.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7721/files/4385121029.pdf
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/deramusujafadomusejuvelal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/15581316093.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/nirugotijatenovufifeja.pdf
    • https://cdn.shopify.com/s/files/1/0434/6707/9830/files/29978807978.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6911/files/33549583410.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/siroludusobiwabefewumefu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8149/7766/files/devabibojojasatunininu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/dazevibivexoruzizir.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/jisedugipigavoxunexewogel.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/99508371229.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/
    • https://cdn.shopify.com/s/files/1/042

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d7.bin
e72a21ed1ffcf4e883d872f901c9b39ebb887839d674ac2eb897ac5c1b1bcb69
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D7 5436 bytes
font_01_sfnt_off0000731a.bin
38bf0345638291d849bf0b60aee4558923f30c1c69e5be6deeb963f3aa8815d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x731A 10204 bytes