Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdcd3a0fe6e3014…

MALICIOUS

PDF

41.6 KB Created: 2020-08-25 05:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70aa9a4a46341f66d816b51f5adb5ff1 SHA-1: e30d85cc317624deb6b9646897e092ad8784bb3f SHA-256: 1cdcd3a0fe6e30142b13c88efaaf460d12bf0a616e7abf6039b3c60a52667fb4
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 many links pointing to Shopify domains hosting PDF files, likely as a SEO spam tactic to improve search engine ranking for malicious lures. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the ultimate destination. The document body itself contains the lure text and the malicious URL.

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=google+docs+book+outline+template
    • http://xomotusim.whiteblossomsoaps.com/uploads/1/3/1/3/131380729/086f6c.pdf
    • http://tojaxesa.rebelplantation.com/uploads/1/3/1/4/131482962/sorak.pdf
    • http://povazul.ggsdesigns.net/uploads/1/3/1/0/131070197/464d6b545b02a1b.pdf
    • http://files.aera19.net/uploads/1/3/1/0/131070379/9873725.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/bejunufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5676/files/xusonilile.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7249/files/3742253612.pdf
    • https://cdn.shopify.com/s/files/1/0437/8460/1752/files/latojibuxilatabixefosin.pdf
    • https://cdn.shopify.com/s/files/1/0437/6903/6958/files/68348534431.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2243/files/sabixadizun.pdf
    • https://cdn.shopify.com/s/files/1/0437/5835/4584/files/download_aptitude_math_shortcut_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/tokopedia_apk_terbaru_2018_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0435/8717/4557/files/jatekunasesij.pdf
    • https://cdn.shopify.com/s/files/1/0445/7195/1268/files/cahier_de_charge_fonctionnel.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/82519764355.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_off000064a9.bin
66ee9406782cb0cf285bce9beaf0bc7ed54cbc45d5d867b5dd278db699db13bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 5532 bytes
font_01_sfnt_off0000776e.bin
91115ef9cdaefcbc417550bcccd289cd572ad370d3cd235ec15404303b221068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 10108 bytes

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