Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10b40d87fe6165d…

MALICIOUS

PDF

35.3 KB Created: 2020-08-03 11:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bcf54cec35d804914c3031947dd7b5e SHA-1: 7d2161ed91580dab06e51af7923d061bf369704a SHA-256: b10b40d87fe6165d787d85a74d2f57ced89ec1b648fda1e1318e46d2e50baeff
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=callidae+voces+pdf. The document body is heavily obfuscated, but the presence of multiple Shopify-hosted PDF links suggests an attempt to disguise the malicious intent. No scripts were extracted from this sample.

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=callidae+voces+pdf
    • http://files.ccjustice.net/uploads/1/3/0/8/130874371/2f045b2.pdf
    • http://files.frederick-biebesheimer3.com/uploads/1/3/0/7/130775123/mobuzoxulab.pdf
    • http://files.fordservoboretransmissionfixsolution.com/uploads/1/3/0/7/130775649/4851727.pdf
    • http://files.ckumaresan.com/uploads/1/3/0/7/130739343/f25f408c3e74.pdf
    • https://cdn.shopify.com/s/files/1/0434/4007/9005/files/viduzonovifuxiwoxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/37820149303.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/python_challenge_level_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/5000/files/kigatukel.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/honeywell_fire_alarm_system_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/72452859772.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53981477141.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/xafife.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/dear_god_avenged_sevenfold_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/6099/2927/files/vewekuwute.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/lonukixonakisugatiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/kerajisaledijizam.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/35007402546.pdf
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/7012752132.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_off00004c92.bin
d67ad05c0e53a60ea4381ba2043dd4b7a13a785de9cb63be3a0b907d2db19de9
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C92 5016 bytes
font_01_sfnt_off00005dbe.bin
055572a714e2050acf5adffddf65d4ba4ce88df89fc7d7ab25c1acb0c6993206
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBE 10284 bytes