Malicious PDF — malware analysis report

Static analysis result for SHA-256 544a5649885adb7e…

MALICIOUS

PDF

54.3 KB Created: 2020-08-21 14:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b71e5dd9cecba36d8efb0eb20642165f SHA-1: f477adb3383f6b283f23cbc4805c10fcf6aa20af SHA-256: 544a5649885adb7e014377c8b50248e3312e9b7f9f3b52f3e937f22165d88551
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=biographical+narrative+example+pdf', suggesting a lure to trick users into clicking malicious links. The presence of numerous links and the critical redirector link indicate a phishing or redirection attack.

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.cc/pify?keyword=biographical+narrative+example+pdf
    • http://files.inthisornfoods.com/uploads/1/3/1/3/131398085/pevejij-pobotu.pdf
    • http://files.ottertotsplayandlearn.com/uploads/1/3/1/4/131453588/59b3e0.pdf
    • http://files.snotogo.net/uploads/1/3/1/8/131856549/papepeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/pirolelonisa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/newopafe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/mimodiralososazowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/2182172946.pdf
    • https://cdn.shopify.com/s/files/1/0440/2026/9221/files/2853857013.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/25243630686.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/food_chain_worksheet_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/31465383666.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/rolitatawotovuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/employment_verification_letter_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/26526213762.pdf
    • https://cdn.shopify.com/s/files/1/0435/5522/5763/files/cuento_bestiario_de_seres_fantsticos_mexicanos.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/45985005068.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/23854919078.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008866.bin
ca916d7af75f4a37145963aaf3f82ba552d6765a10eb4761b835ae7414d5586d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8866 5356 bytes
font_01_sfnt_off00009a75.bin
27cfb6827ef60a22be72ec4ba87f7b5be14dd1352951c8645b76ff5e1e678b36
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A75 10304 bytes
font_02_sfnt_off0000bda2.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA2 4324 bytes