Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd814c6141734f8…

MALICIOUS

PDF

44.5 KB Created: 2020-08-23 20:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d095858197779a38de72df91f7b5c02 SHA-1: 5373a89f88fd00eaf048bf915f3e88b4a1816a1a SHA-256: fbd814c6141734f8f6ff953ed58bdfa475abdd644b26362004228a52ffe02520
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the text 'best bed sheets ireland' and the malicious URL, suggesting a lure to a scam page. The presence of numerous PDF links, many pointing to Shopify, suggests an attempt to blend malicious content with seemingly legitimate resources.

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=best+bed+sheets+ireland
    • http://zumefatef.ambermediatt.com/uploads/1/3/2/7/132740249/fevugememareja.pdf
    • http://vepoz.aitosaudio.com/uploads/1/3/1/4/131483453/67ee2c9b52b25.pdf
    • https://cdn.shopify.com/s/files/1/0440/5886/9910/files/pezosujimig.pdf
    • https://cdn.shopify.com/s/files/1/0436/2256/4000/files/figures_of_speech_worksheet_for_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8104/files/76402893462.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/e_1_31_42m.pdf
    • https://cdn.shopify.com/s/files/1/0433/4508/4574/files/38904597357.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/zixoduwajezute.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/ditagi.pdf
    • https://cdn.shopify.com/s/files/1/0462/2480/1946/files/pepuzorufodonimotupabelup.pdf
    • https://cdn.shopify.com/s/files/1/0437/8253/7365/files/37845187669.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/52156829670.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3118/files/71626216250.pdf
    • https://cdn.shopify.com/s/files/1/0448/1787/5110/files/change_file_to_word_document.pdf
    • https://cdn.shopify.com/s/files/1/0428/5290/9212/files/we_livetogether_videos.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_off00006fed.bin
0dac8c6aad8b90a840d87979cf7ad304c7671a700f25da28b9f221785442359d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FED 5100 bytes
font_01_sfnt_off00008133.bin
4dff5a0e298d92f626af8bd9c99b1493ef80d5ca4386cf338d3cc30bcb19780c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8133 10604 bytes

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