Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b7cab6d0388fac…

MALICIOUS

PDF

43.8 KB Created: 2020-08-03 18:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc271e55fc2747699839646207d5d157 SHA-1: a108babaf9571f2e1a5d273d3e67ee64abb8f515 SHA-256: 87b7cab6d0388facad00d5fe8360bd5a9013ebe970d7f3464ca2e940c98a8ad3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, including one pointing to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to trick users into clicking it. The presence of a PDF link farm and a malicious redirector indicates a phishing or redirection attack. No scripts were extracted from this sample.

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.com/pify?keyword=guitar+chords+christian+songs+pdf
    • http://files.thevictualbar.com/uploads/1/3/1/4/131438038/nekomopu.pdf
    • http://files.bazowska.com/uploads/1/3/1/4/131455158/zorepobaw.pdf
    • http://files.perspectate.com/uploads/1/3/1/3/131384171/ruwabupojazewu-zaxemazus-zutoxin-vemutiwevabuxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/93916486089.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdf
    • https://cdn.shopify.com/s/files/1/0432/4491/2802/files/vokizowupewevurelaresuzom.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2102/files/gejoveg.pdf
    • https://cdn.shopify.com/s/files/1/0441/3403/9704/files/76605257943.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikodizexosuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/aqualung_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/gugisezurimanavulodozi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/85120908582.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/banan.pdf
    • https://cdn.shopify.com/s/files/1/0432/7263/4533/files/79320350382.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/53438627534.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_off00006ced.bin
7c6130846b3331b58de256798099cb12c64ade279cbf822d78f88c7b52ce81a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CED 5416 bytes
font_01_sfnt_off00007f56.bin
37139ac4a26c75dd52dfe527d9d954d9d4fa10072d8ba2e5554f219f0e6153a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F56 10120 bytes

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