Malicious PDF — malware analysis report

Static analysis result for SHA-256 fecb1d542c87e54d…

MALICIOUS

PDF

46.3 KB Created: 2020-08-10 23:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ffdbc09431567f1ad1f69f5b81db74f SHA-1: eb23456733292c38ab175f9ef726f18f02f1a3b5 SHA-256: fecb1d542c87e54d250355d6eda5691c0ff1cc5ff1abb8c96773b083a2c1b016
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, https://ttraff.com/pify?keyword=adolescent+psychology+textbook+pdf, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains this URL, reinforcing the malicious intent. The presence of numerous links to external PDFs, including those hosted on Shopify, indicates a link farm designed to obscure the true destination.

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.com/pify?keyword=adolescent+psychology+textbook+pdf
    • http://buvuwe.corealis-ing.net/uploads/1/3/1/3/131380600/miris_jefite.pdf
    • http://bavefituv.mustangsbasketball.com/uploads/1/3/1/4/131437987/kujujexud_vopodusuvolek_loligurolaluma_zowuxopube.pdf
    • http://files.teachingwriting.co.uk/uploads/1/3/0/7/130776416/a53a1d0ff619.pdf
    • http://files.joyful-spirit-church.org/uploads/1/3/2/8/132814680/1585556.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2773/files/beralanafikagaratolelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3782/6973/files/46473125893.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/9961258465.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/normas_internacionales_de_auditoria_interna.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/80307156071.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8291/files/nitidonakusarilavori.pdf
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/lexakabewobubosa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/kidibimupovonifo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7141/files/rotate_screen_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1416/files/donanakasoxifokavijatojig.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/afterburn_sylvia_day_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1097/files/chemical_admixtures_for_concrete_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0437/5825/6286/files/pujuraxiz.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_off0000753a.bin
cf7fb5995fd4f764e0b03e6f9f66ee3e69eaaef52c414405e66ee99a94d002e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x753A 5476 bytes
font_01_sfnt_off000087e7.bin
1caf639fb7f8ffb05c74c2acc32fd3501f93b8b6cb3f5b3d6f5490f3585a8a80
pdf-font-stream PDF embedded font (sfnt) at offset 0x87E7 10596 bytes