Malicious PDF — malware analysis report

Static analysis result for SHA-256 867da35ff8b52942…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 22:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a18bd7a346dd5268fbfe26ce6e33abd4 SHA-1: a1c4da112b079dba0182e58c950c0581c4a5a27f SHA-256: 867da35ff8b52942c8f0df3f7cd140818bd4951fd8e753e3215e93145b0e88dc
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a link that redirects to a known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the target URL. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, suggesting a link farm for SEO manipulation or traffic redirection. The SE_DOWNLOAD_BUTTON heuristic further supports the lure of a call-to-action to click the link.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/wix?keyword=the+wall+street+journal+guide+to+information+graphics+epub
    • https://static.usrfiles.com/ugd/d2751c_46e5063a4b4c4c2ca32e8c0e14ab1410.pdf
    • https://static.usrfiles.com/ugd/c20ea7_439c804174574007b22e6e12d52250bf.pdf
    • https://static.usrfiles.com/ugd/c068f8_9d7689504fae42fda65bf379b9507072.pdf
    • https://static.usrfiles.com/ugd/81d6a4_3f4ecd141bb146c6bb04c089f8880376.pdf
    • https://static.usrfiles.com/ugd/b8c837_292b33e770de484aaf91ce4a74933f5e.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/honey_gain_app_apk.pdf
    • https://static.usrfiles.com/ugd/8b97dd_b6cda2b4b5c14ba5a6ee16bcefdbb663.pdf
    • https://static.usrfiles.com/ugd/2486b5_435d6d541dcf4bd598c90404047c897e.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d364c43a68e4f07b13599ffe54ea286.pdf
    • https://cdn.shopify.com/s/files/1/0447/7875/0101/files/top_10_latest_bollywood_movies_sites.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vabagibad.pdf
    • https://cdn.shopify.com/s/files/1/0437/3001/0273/files/meaning_of_gayatri_mantra_in_telugu.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_off000056a5.bin
9978a6fdb1a122e07e35af27ff6483546dfe8ed33b17d5845c191f0b18e3aae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A5 5828 bytes
font_01_sfnt_off00006a59.bin
9383763ff4663b745de0dfe92635836b061ee0ffe4810bb4f9b080ac94572072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A59 9956 bytes

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