Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b05fbb8bc8e16a4…

MALICIOUS

PDF

41.0 KB Created: 2020-08-04 04:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73a8c43808d30d94d6ed5289182d8183 SHA-1: 6bdbc16f6ef1d598ef17e0f69804b4c765ee5d76 SHA-256: 9b05fbb8bc8e16a46eacbb1e7d856ab83099a5ad2762107aad7b31cbf610e564
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 one identified as a malicious redirector. The document body, though heavily obfuscated, also contains URLs. This suggests the primary purpose is to lure users to external sites, likely for phishing or malware delivery. 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.ru/pify?keyword=correlative+conjunctions+exercises+multiple+choice+pdf
    • http://files.angelsgowns.com/uploads/1/3/1/4/131406437/0ea38.pdf
    • http://files.hearthisspace.com/uploads/1/3/2/6/132695408/neliwim_judimenorosati_zevataf.pdf
    • http://files.inspiringhopecampaign.org/uploads/1/3/1/6/131637114/repiwegebowubem.pdf
    • http://files.digcitkids.com/uploads/1/3/1/4/131453251/81542d65c27171.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/18183560902.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29876283886.pdf
    • https://cdn.shopify.com/s/files/1/0434/8031/8118/files/27681350902.pdf
    • https://cdn.shopify.com/s/files/1/0430/6917/8017/files/38388601439.pdf
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/19735469923.pdf
    • https://cdn.shopify.com/s/files/1/0429/6612/2662/files/30029058528.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/biogeochemical_cycle_of_carbon.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/namebetiduvisu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/59385918528.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5609/files/surabaxumugomuvoxop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9826/0124/files/12428792834.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/34002221891.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_off00006060.bin
ca3ed43bdb7d4dcfdf954957a9d012760888e24c4c27dd999743bb4df5142409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6060 5504 bytes
font_01_sfnt_off000072f5.bin
643d2f16658a3fbc297a3f2dc920e304f13bd0c066f06bb8e1c305d5bbd7c653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F5 10504 bytes

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