Malicious PDF — malware analysis report

Static analysis result for SHA-256 b541eeebd377e470…

MALICIOUS

PDF

40.9 KB Created: 2020-08-04 10:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a410ae137fd84c29aa939014616f4a7 SHA-1: 794ad2834fd42e419bc9744460102b1162f49cb9 SHA-256: b541eeebd377e47034ec992ab5e32d6a87b0435f065140bc5cc52463301266f3
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.com, which is used to redirect users. The document body, though heavily obfuscated, contains text related to 'writing tips for ielts pdf', likely a lure to entice users to click the malicious link. The file also contains a large number of links to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic.

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=writing+tips+for+ielts+pdf
    • http://files.kreationsbykayonline.com/uploads/1/3/2/6/132681464/2041792.pdf
    • http://files.rleveille.com/uploads/1/3/1/8/131871864/gires.pdf
    • http://files.fpcmorganton.org/uploads/1/3/0/9/130968996/2f1fb34a1.pdf
    • http://files.kinrossmensshed.org/uploads/1/3/1/6/131636995/2469206.pdf
    • http://files.brandieckertphotography.com/uploads/1/3/1/4/131408017/8165813.pdf
    • https://cdn.shopify.com/s/files/1/0437/8741/9805/files/wow_classic_swiftness_potion.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80835258875.pdf
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/givagad.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/wevuzawagezegonejujud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/napidumividore.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/14758658947.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/jodumopumovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/19513734781.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0082/files/john_deere_410_backhoe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29480145432.pdf
    • https://cdn.shopify.com/s/files/1/0434/5842/9089/files/dd_1172-_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/bebodiborasusifefitised.pdf
    • https://cdn.shopify.com/s/files/1/0437/8394/6397/files/3256389164.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_off00006265.bin
c77efa0586209e1230260b33f3abd33689f24d13eae557b3b3a847805f180d7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6265 5012 bytes
font_01_sfnt_off00007398.bin
2d150b4813acf950f6256c6ca834ef187e56a4498947b6de60d793613f801865
pdf-font-stream PDF embedded font (sfnt) at offset 0x7398 10264 bytes