Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0ccdc37bd98531…

MALICIOUS

PDF

40.9 KB Created: 2020-08-11 03:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c9fd118c6b753816b3ce78ae623e9e6 SHA-1: 57112319545ce4ba7eec099fae53273a73efa821 SHA-256: aa0ccdc37bd9853123f2507d1a1ef6ccd2bc783b5b84517f4c4c1a5eced40b48
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 'https://ttraff.com/pify?keyword=tofacitinib+alopecia+areata+pdf'. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on various domains, some of which are flagged as unknown reputation. This suggests a phishing or scam attempt using a medical topic as a lure to redirect users to malicious infrastructure.

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=tofacitinib+alopecia+areata+pdf
    • http://pabut.ftmaagojuryu.com/uploads/1/3/0/7/130775248/bdee39.pdf
    • http://pusirik.hearttoheartfarm.com/uploads/1/3/1/8/131871721/5391162.pdf
    • http://toruzelu.yestojesus.net/uploads/1/3/2/3/132303238/6123270.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/99862971392.pdf
    • https://cdn.shopify.com/s/files/1/0440/6021/3398/files/84651912028.pdf
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/vimeo_closed_captioning.pdf
    • https://cdn.shopify.com/s/files/1/0436/0624/5534/files/sujesolanulo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/tutuzafimebajapovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8151/files/nunoxodikizasivexo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/81943826547.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/medical_aspects_of_chemical_and_biological_warfare.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/82404802681.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_off00006120.bin
e57fdff8adb4ae0e6557e8bb4c93bda78a6196864b100884cef915501bcbee27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 5060 bytes
font_01_sfnt_off0000725a.bin
3def648466abbdeffaa097204493330758d5ef62854f3c2a234e8340e9432803		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725A 10816 bytes

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