Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afffa2cdb7ed3bd…

MALICIOUS

PDF

38.7 KB Created: 2020-08-31 17:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a77ef480c7a95c723928b9612910514 SHA-1: 36ff9b0f004a6d8e376a2c97389e7a93ed0412f5 SHA-256: 9afffa2cdb7ed3bd1af2d28ec706bfb782c72bea5e1082b00215203316354e2b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The document body and extracted URLs suggest a lure related to 'allen test papers pdf 2019 jee', which redirects to a suspicious domain. The PDF_SEO_LINK_FARM heuristic further suggests the document is part of a link farm, likely for SEO manipulation or to distribute malicious links. No scripts were extracted, but the primary attack vector appears to be a malicious redirector disguised as a document link.

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/pify?keyword=allen+test+papers+pdf+2019+jee
    • https://cdn.shopify.com/s/files/1/0452/6263/5168/files/tenancy_agreement_sample.pdf
    • https://cdn.shopify.com/s/files/1/0434/4522/3581/files/zarifotobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/8173503061.pdf
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/niruzoketomufe.pdf
    • https://cdn.shopify.com/s/files/1/0443/8809/0022/files/melinomizowelegamosag.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/20416292424.pdf
    • https://static.usrfiles.com/ugd/b8c837_f176fa14edcc4e20b800d4378513acbb.pdf
    • https://static.usrfiles.com/ugd/dd4472_da06cd08296b40a6abcd884bed7912c9.pdf
    • https://static.usrfiles.com/ugd/238140_b0aad6ed5370428581e92aa5dd1396e1.pdf
    • https://static.usrfiles.com/ugd/be19e1_319fb638d04c4178b604c23dfa7fa0da.pdf
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/demurikasujizode.pdf
    • https://cdn.shopify.com/s/files/1/0463/2431/8363/files/41181101543.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/rakanodavakasitolinun.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9363/files/free_shopify_booster_theme.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_off0000571d.bin
f2b45e30a8864674c460eab43eb2433ddbe752cc16b8e44e4cfb346297820c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x571D 5584 bytes
font_01_sfnt_off00006a2e.bin
d2b5a108fe378a1d199207876a6ba1fecc9c599f206af4d381c8b7271967d201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2E 10620 bytes

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