Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc66f35a422f0ac4…

MALICIOUS

PDF

46.4 KB Created: 2020-08-24 14:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f3f50671033c5ebd30e77c180a8e4f1 SHA-1: 66cd2e4961122c8cdb020b867825c09d32de8a28 SHA-256: cc66f35a422f0ac4461c42aaf0dbe482b6be6db59c791ac36d6867a6d609e7c7
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.cc/pify?keyword=income+guidelines+for+medical+in+pa'. This URL is embedded within the document body, suggesting a social engineering lure. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on shopify.com. The primary malicious IOC is the redirector URL, which is likely used to lead the user to a further malicious destination.

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=income+guidelines+for+medical+in+pa
    • http://files.suearchibaldart.com/uploads/1/3/1/4/131414134/dusonuserunixub.pdf
    • http://files.scuttsdrivingacademy.com/uploads/1/3/0/8/130874469/4931291.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/48265845039.pdf
    • https://cdn.shopify.com/s/files/1/0433/2440/7961/files/41528985888.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6522/files/ramorugugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/sample_cheer_tryout_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/make_row_fixed_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0448/1508/9825/files/70571055372.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2527/files/30706783396.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/34474933462.pdf
    • https://cdn.shopify.com/s/files/1/0429/8407/9523/files/40498367582.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/52753275938.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/pictionary_rules.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_off00007748.bin
fa7b6de12b75d439cc4fa387feb5c040cc6ed031b62ce152c2602fb0ee6c3f72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7748 5412 bytes
font_01_sfnt_off0000898f.bin
98ac95d31413dca6d408d6e37331889917417aef7d23d08e8f49615dbf6563a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x898F 10408 bytes

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