Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69489d692a28912…

MALICIOUS

PDF

46.9 KB Created: 2020-08-30 13:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e70f9e8f26d67511b378a1b68e94ed8 SHA-1: 0ba9784b25f05d79ed2e6be2c1b28c85010c267d SHA-256: a69489d692a28912183482a9000410d0ab48d995a8be52a21c5fe7fbd1495280
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=brisingr+online+pdf'. The document body, though heavily obfuscated, contains text suggesting it is related to 'brisingr online pdf', likely a lure to encourage clicks on the malicious link. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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=brisingr+online+pdf
    • https://static.usrfiles.com/ugd/d5415a_e411c82dff184087b3b2cc5c900600f9.pdf
    • https://static.usrfiles.com/ugd/269bb8_3c7cfe8cbce048b4af81dcfdbd74f085.pdf
    • https://static.usrfiles.com/ugd/d94ae5_f397ab9c938b406c9272ff51eb1e6265.pdf
    • https://static.usrfiles.com/ugd/16a96a_596876b02a4a44d19ab031cb8eb448ac.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_abaa73cf9c7f417bbfafd406b2d202ee.pdf
    • https://static.usrfiles.com/ugd/ce77c6_42277dc60b9943eb9bbe77907f7fd5cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_c263528a7c924f2cafb1adabde3828a9.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/sikuxom.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/13132378502.pdf
    • https://static.usrfiles.com/ugd/4b874d_674be6eabaff436ab7190fcf92977a1e.pdf
    • https://static.usrfiles.com/ugd/89064d_df066e4d9d11419a91c3200eb3d1b18f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a2c7ab771be4782bb82ef33e6564db6.pdf
    • https://static.usrfiles.com/ugd/b8c837_bde42127c2db462f8736965f0738237d.pdf
    • https://static.usrfiles.com/ugd/0a052f_573232c9cd22419c951d08792c56f04a.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_off00007a61.bin
762ce8d522fc3195a29100aa62a9af4f8991a2b1f8696ce50bf5b801bbf5191d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A61 5048 bytes
font_01_sfnt_off00008b9a.bin
abeab3261bc381d301d503728f2454d7b5903d095d459fbd5aff08274ab9028a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9A 10324 bytes

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