Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d5a0c1469fc3dd…

MALICIOUS

PDF

33.4 KB Created: 2020-08-04 16:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b5a3692ec6cce15b18626e5efa63b0d SHA-1: 947cd4c4e7d8c58b90ce07028f1f3aae669663dc SHA-256: c3d5a0c1469fc3dd44dc4bbea757c03f29dde143778941b23fe6c75ec8fec8fe
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=carefusion+product+catalog+pdf', suggesting a lure to a malicious site disguised as a product catalog.

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=carefusion+product+catalog+pdf
    • http://files.skwarczynskifilms.com/uploads/1/3/1/6/131606122/3713372.pdf
    • http://files.maizewallin.com/uploads/1/3/0/7/130775106/8667528.pdf
    • http://files.mesillavalleyfinearts.com/uploads/1/3/1/4/131406149/1105112.pdf
    • http://files.rootdown-riseup.org/uploads/1/3/1/8/131871705/memuporutowul_mapabileduf_gexuse_bulapowenolovor.pdf
    • http://files.marisalivetbooks.com/uploads/1/3/1/4/131437725/85af353.pdf
    • https://cdn.shopify.com/s/files/1/0436/0978/4482/files/suzejineni.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/33571133375.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4991/files/ham_test_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/9675/1774/files/15838162470.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/30314289912.pdf
    • https://cdn.shopify.com/s/files/1/0434/5269/4680/files/64167943406.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/62184970493.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/fepuzilukusitinudosajex.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/23283455817.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/niferulewil.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/62891778177.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_off000045d8.bin
68c8cecd64d14424f45fa7d5bb196f3b3a828f7af2636133f6e4ef0d17a951bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45D8 5228 bytes
font_01_sfnt_off000057b1.bin
2784e157e39052c2e0895ab4e3ff3d262f377e76c013e679d53d9431a2652ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B1 9688 bytes

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