Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44efb190dfad4f8…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 05:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 809239025178251af711225b3e86f03f SHA-1: c17855e1ac5ff6d9a7000e6d5400f6526258c49a SHA-256: e44efb190dfad4f83c74222703d4b178322edbbd714e6bde0410e32d3b06c070
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. It also fired for PDF_SEO_LINK_FARM, suggesting the document is part of a link farm designed to manipulate search engine results. The embedded URL https://ttraff.com/pify?keyword=thyroid+and+antithyroid+drugs+pdf is the primary indicator of malicious redirection. The document body, though heavily obfuscated, contains references to the malicious URL and other URLs hosted on Shopify, likely as part of the link farm.

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=thyroid+and+antithyroid+drugs+pdf
    • http://files.bremertonfoodline.org/uploads/1/3/0/9/130969545/67e7154f18e0354.pdf
    • http://files.intechsol-pr.com/uploads/1/3/2/6/132695636/vijana.pdf
    • http://files.boomerbones.com/uploads/1/3/2/7/132740281/dexenulet_tozisol_fakerixidakuvo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6414/files/agile_scrum_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/60175887640.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/pifosisunizin.pdf
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/57982885697.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/6273771244.pdf
    • https://cdn.shopify.com/s/files/1/0429/4646/1852/files/67800520418.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/zosiwekebulexixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/jiresaroloronumuvaxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/xeledumagerafixomek.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7122/files/mitazixijeludefuliretaso.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/why_did_notsobot_get_banned.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_off000069cc.bin
dc21e25e5e8e54822b2ee1a25e435c7bb1d7b70772116311df0c6415c8a69fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CC 5320 bytes
font_01_sfnt_off00007bec.bin
1ad9cfda1ebaec193fb4e87d3242457a747cebdaf79d4e8db715d6e1e6698857		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEC 10168 bytes

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