Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1bee1493ae7323…

MALICIOUS

PDF

40.0 KB Created: 2020-08-31 03:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b42aad56d9e56485a74023ec4d84c8fd SHA-1: a1e4a93163deeab811c34d091a77cb72ce3696cf SHA-256: cd1bee1493ae7323bb60c1abf68e0b934f55fb8a4ebcb51edd9db5747e575f06
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a mass of external PDF links, likely for SEO manipulation. The document body contains the target URL and a list of other PDF links, reinforcing the lure. No scripts were extracted, but the presence of a malicious redirector suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/wix?keyword=scroll+template+for+cakes
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/exotic_birds_mod_1._7._10.pdf
    • https://cdn.shopify.com/s/files/1/0436/4664/8473/files/electronic_distributor_ignition_system.pdf
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/83178268828.pdf
    • https://cdn.shopify.com/s/files/1/0438/9719/2603/files/sensory_evaluation_of_food_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1419/3311/files/gaduviduvoravikofi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/putifuzavi.pdf
    • https://static.usrfiles.com/ugd/eb4c03_18bdca6f20c841c79b7298aef5e6a89f.pdf
    • https://static.usrfiles.com/ugd/b8c837_45eea6fc25a44ca69e9ed652ba3cb6c1.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/fuziturepitoluba.pdf
    • https://cdn.shopify.com/s/files/1/0431/8543/8884/files/757873195.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_off00005dc0.bin
a386fb7af628634bb1630a859e39ece7449c8b4d37249ae962931a1531114d24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC0 5328 bytes
font_01_sfnt_off00006fc4.bin
df2af7c954bca474f32e89093b8315783894ee422e0a6a70ab8ea4b956b0c291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC4 10488 bytes

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