Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28a3e67751a7ecb…

MALICIOUS

PDF

42.9 KB Created: 2020-08-13 17:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a9265714d04864f0cbb78ed91545c4 SHA-1: 3584ff025899a3acdb8980568ccf5ceb371cdfdf SHA-256: f28a3e67751a7ecbc39bd5dab03a3d56b45ac00ef0fa641afb32881f39ebc76d
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded external links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/wb?keyword=cholera%20management%20pdf, which is likely used to redirect users to a malicious site. The document body contains garbled text but also includes the same URLs, reinforcing their presence and likely malicious intent.

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/wb?keyword=cholera%20management%20pdf
    • http://kowiwa.southernmarylanddietitian.com/uploads/1/3/0/7/130738546/6496101.pdf
    • http://files.gracekuchmusic.com/uploads/1/3/1/4/131453559/jeboli-devumewu.pdf
    • http://files.basicsoflearning.com/uploads/1/3/0/8/130814101/nuluvaligup-nanixazib-naxanikolabodis.pdf
    • https://cdn.shopify.com/s/files/1/0432/3406/6600/files/pixelmon_shiny_stone.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0302/files/guwewipatosemefodi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6624/2710/files/42611700839.pdf
    • https://cdn.shopify.com/s/files/1/0454/5331/2150/files/21623764992.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/82830604664.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/socket_head_cap_screw_size_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4250/files/91631974536.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/13942469770.pdf
    • https://cdn.shopify.com/s/files/1/0434/6786/6265/files/82957317395.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/antrenmanlarla_matematik_4_yandex.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/mariv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/75441004276.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_off00006ab9.bin
1735bc324c2f4378fd7c3253dba14a7ed080860e436416a0063938ae5f3536f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB9 5184 bytes
font_01_sfnt_off00007c32.bin
9ae48e5061cff5913b1ce649a1ae97a87ebc780845a3e1f254989e9a8a9ae1c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C32 10332 bytes

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