Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedc8eafcfcbee42…

MALICIOUS

PDF

43.3 KB Created: 2020-08-17 00:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a73b0a3cb66f5a6a9dc3aaabe66f1382 SHA-1: 5e3ae220b53820fc7f4347f9d02259bc4a00ba69 SHA-256: aedc8eafcfcbee428bb6f27e6c22d2598ea4d1a62249cf32b0e733a0c6ad8d6b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=dictionary+worksheets+for+fourth+grade', which is flagged as malicious. This suggests the document is part of an SEO poisoning or phishing campaign designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=dictionary+worksheets+for+fourth+grade
    • http://wojane.circusparkmedicalvillage.org/uploads/1/3/0/8/130814297/zefokek.pdf
    • http://files.thevillageyarnery.com/uploads/1/3/2/7/132740805/2017469.pdf
    • http://files.durhamtamils.org/uploads/1/3/1/1/131163959/xovilujilogez-rasusugoxi-madiza.pdf
    • http://files.g-gees.com/uploads/1/3/1/4/131453522/559feb5a.pdf
    • http://files.ccmooresville.com/uploads/1/3/1/3/131381819/tanupip.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/vodepawanobenakubezadi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9099/files/electrocardiograma_derivaciones.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/dolphin_emulator_4._0_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4971/3817/files/servo_motor_arduino_code.pdf
    • https://cdn.shopify.com/s/files/1/0435/8694/5187/files/72615071925.pdf
    • https://cdn.shopify.com/s/files/1/0434/7694/3000/files/afcat_2020_answer_key_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3997/1738/files/diaphragmatic_breathing.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/62694148352.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/bipisamojozuzer.pdf
    • https://cdn.shopify.com/s/files/1/0454/3338/9214/files/13635890188.pdf
    • https://cdn.shopify.com/s/files/1/0429/1205/5463/files/laxefebekuledawiluk.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/judikap.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/accounting_basics_uk.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_off00006949.bin
8b2f9c64ff70d29ed18ebf5225c0e923e434e87ad0b7a02cdf12ff135c5c50d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6949 5508 bytes
font_01_sfnt_off00007c14.bin
c8f7b3044096fbf06b2082be28dd89f8790d444b4abb96dc75f76ac144669cec
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C14 10364 bytes