Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3604009963b9b8…

MALICIOUS

PDF

40.1 KB Created: 2020-08-25 19:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55d2e14d2188c48d56e882213e0f3af3 SHA-1: 38c21d995498de844b8adc0866136f3b05cba0ac SHA-256: 3d3604009963b9b857c2815c556c5249bfa74edbbcdcb93c4acde9e82ff1663d
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL leads to a redirector that appears to be part of a SEO link farm, likely intended to host malicious content or phishing pages. The document body contains text related to 'ap computer science principles practice exam' and includes the malicious URL, suggesting a lure to trick users into clicking the link.

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.me/pify?keyword=ap+computer+science+principles+practice+exam
    • http://limijile.millersgardenservices.co.uk/uploads/1/3/1/4/131438268/04f536.pdf
    • http://files.ksasteel.com/uploads/1/3/0/7/130776743/favemabirulavo.pdf
    • http://files.bigobikeshop.com/uploads/1/3/2/6/132683070/dajufinovokesifomer.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/tutorial_cade_simu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/69439284714.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/83507780022.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/frankenstein_2015_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/juwaxewo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/73573865523.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/liruzifisaseso.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/sadeboliraxikiwukadufiz.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_off00005d45.bin
5f23c5c1905ccff8ea027984ae4c13b0709192c72f341e6fc399e424955b7899		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D45 5136 bytes
font_01_sfnt_off00006ea1.bin
957da2d9b2761a2c4a22dd838091f3f1adbdff11b96f93be1b28dc5d17f23e5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA1 11012 bytes

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