Malicious PDF — malware analysis report

Static analysis result for SHA-256 2762ac1ef4c26faa…

MALICIOUS

PDF

114.8 KB Created: 2020-08-18 22:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a6dde94700d2ac3515730c20130832c SHA-1: 628044751df96a2f4470b0e791da21788f9ab69d SHA-256: 2762ac1ef4c26faa0252e45c879530b64f80cad7ec64fb0a038a96ba8d7852e2
128 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Illinois constitution test answers 2019' and a URL that appears to be a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or distribution. The SE_INVOICE_LURE heuristic further supports the idea of a deceptive lure. The primary attack pattern involves tricking the user into clicking a malicious URL.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=illinois+constitution+test+answers+2019
    • http://files.thesilvergoddessjoanib.com/uploads/1/3/2/7/132712040/5298681.pdf
    • http://wupibimiw.fellwalkingphotographs.com/uploads/1/3/1/4/131453574/4463244.pdf
    • http://files.cardconnectnetwork.com/uploads/1/3/1/4/131483083/7571247.pdf
    • http://files.fancyflipevents.com/uploads/1/3/0/8/130813913/2a0504e73ba4a5f.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/90877856388.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/zibebivawuwasu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2271/0941/files/96175179889.pdf
    • https://cdn.shopify.com/s/files/1/0433/1402/0505/files/biwumeruxidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/1911_blueprints.pdf
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/fulevume.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/todisisagotuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/49342081765.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_off0001880a.bin
1ffc08d6e166db0f728a164386320b141e035699373910d9acc58a02656b17a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1880A 5304 bytes
font_01_sfnt_off00019a31.bin
4b21e99d58825799b2b80994f8979306b937e304e176ae11aad703457b33d207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19A31 10528 bytes

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