Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bbc598ffc9319b…

MALICIOUS

PDF

53.1 KB Created: 2020-08-11 02:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70ed11668b58be32ed378188cddf33c7 SHA-1: a346244567f119d28676949043132d3d017dc46d SHA-256: e8bbc598ffc9319b42927d00a9b193d24610c7a787ae0e694421ae0cfbc7cf3a
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=basic+accounting+principles+uk+pdf'. This indicates the document is designed to lure users to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, many of which are hosted on cdn.shopify.com and other domains, suggesting an attempt to distribute malicious content or engage in SEO abuse. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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=basic+accounting+principles+uk+pdf
    • http://files.harveyavidonphotography.com/uploads/1/3/1/4/131437457/runiretodizev.pdf
    • http://files.saltwaterschool.com/uploads/1/3/1/4/131438098/remunitimujutok.pdf
    • http://files.philipleong.com.au/uploads/1/3/1/0/131070911/sunupi.pdf
    • http://files.ledfl.com/uploads/1/3/2/6/132695994/pelepe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/figo_classification_of_abnormal_uterine_bleeding.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/jopepavawukex.pdf
    • https://cdn.shopify.com/s/files/1/0433/5363/7018/files/56269799359.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/bekube.pdf
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/45026618311.pdf
    • https://cdn.shopify.com/s/files/1/0434/5869/1232/files/allan_kardec_book_of_spirits.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2621/files/18835596942.pdf
    • https://cdn.shopify.com/s/files/1/0432/7397/8011/files/82706111650.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8535/files/61196255958.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/asme_section_ix.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/julas.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_off0000911b.bin
644c37c241728f62d31396ca0b23d52d0ae45eed9630b33476c7090e46e2a1f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x911B 5436 bytes
font_01_sfnt_off0000a3a2.bin
dc7dac52dbe14348993448deb08369bc1b5da684aa0198b76e9357d1d229ef10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3A2 10484 bytes

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