Malicious PDF — malware analysis report

Static analysis result for SHA-256 db32870efca9ee89…

MALICIOUS

PDF

34.1 KB Created: 2020-08-16 23:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6de6cbe5909f99d164e03209f65c4e12 SHA-1: 9008af6f7382562b85c5650fcc28f4ddbf9b9ab4 SHA-256: db32870efca9ee8998081f37722a7e8e0b71d76a8759e5b39d9a9b3f8f630f76
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=types+of+books+fight+list+answers'. Additionally, another critical heuristic indicates a PDF link farm, with numerous links hosted on cdn.shopify.com and other domains, likely for SEO manipulation or to host further malicious content. The document body itself is heavily obfuscated but contains references to the redirector URL and several shopify URLs.

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=types+of+books+fight+list+answers
    • http://files.jessicabashline.com/uploads/1/3/1/0/131071067/34a199a.pdf
    • http://jujug.msunorthfarm.org/uploads/1/3/2/8/132814930/7d23a605a9ee.pdf
    • http://gejebiru.hypershft.com/uploads/1/3/1/3/131380005/novonafe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/26685348179.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/98719300517.pdf
    • https://cdn.shopify.com/s/files/1/0434/1632/2215/files/48743876738.pdf
    • https://cdn.shopify.com/s/files/1/0437/7133/0717/files/68465304125.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/61684116043.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/speaking_ielts_topics.pdf
    • https://cdn.shopify.com/s/files/1/0432/7256/8996/files/nusodenufire.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/47537553263.pdf
    • https://cdn.shopify.com/s/files/1/0436/6978/2693/files/45706750953.pdf
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/10538908527.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4885/files/31398964236.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_off0000489a.bin
3676a5a82222999e08030035767de2a3286a7737b2fbd805ea2b90c6f6202135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x489A 5512 bytes
font_01_sfnt_off00005b6f.bin
5aa2b4bebcec38092785cbefded722547bd4702776e59d01bee5bece30673a64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6F 9444 bytes

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