Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb5917aec9edea2…

MALICIOUS

PDF

41.8 KB Created: 2020-08-12 12:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 519775e3de9fdb3f70eb6f6d5e67f598 SHA-1: 89ba3056afc757d1983b558b717fde9f6c984f46 SHA-256: deb5917aec9edea28f7ddc03289acca14996bcfd0456d7796a38787099a5ab78
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=antioxidant+meaning+pdf`. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. Additionally, a heuristic for a PDF link farm was triggered, suggesting the document is part of a larger SEO poisoning or link distribution scheme. The document body, though heavily obfuscated, contains the same redirect URL and several other URLs hosted on Shopify and other domains, some of which are confirmed benign while others are unknown.

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=antioxidant+meaning+pdf
    • http://files.phdoodlesco.com/uploads/1/3/2/6/132681861/gozarenobefune-zatux-lidowaxawu-xowofiga.pdf
    • http://files.pornpurity.com/uploads/1/3/1/8/131871605/3853882.pdf
    • http://files.nancyfreemanstudio.com/uploads/1/3/1/6/131607027/witololafamilaw-vuvawat-zakilaj-zivepunilolokip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69892687871.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1013/files/39774800601.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/56028512385.pdf
    • https://cdn.shopify.com/s/files/1/0432/2128/7080/files/phonetics_and_phonology_noun.pdf
    • https://cdn.shopify.com/s/files/1/0437/8211/1381/files/28988744779.pdf
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/56573870057.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/xujaburosilixemaxugozeji.pdf
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/xasepa.pdf
    • https://cdn.shopify.com/s/files/1/0435/9317/1103/files/dosox.pdf
    • https://cdn.shopify.com/s/files/1/0432/5628/3296/files/alagappan_medicine_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/bumikokabudugisise.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_off00006787.bin
7b336187459d87dac67858c2a877b086165ef65ee314c6af9fcf3dc9e050ad06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6787 5112 bytes
font_01_sfnt_off000078e5.bin
e510a685da66a23aa8dd396f89247e71654b756ea2e2a34813f142c3f1afe05b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E5 9820 bytes

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