Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d5671cb78a20dd…

MALICIOUS

PDF

46.5 KB Created: 2020-08-12 19:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6af7a8f147248322b345e1759496b596 SHA-1: 55e6b73a38d685a1ea47d60c38da1e474dad2361 SHA-256: c7d5671cb78a20dd150738dba00c06d3c38e01a0996299019d3bd3992bcc1962
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious URL, disguised as an essay on bullying. This indicates a social engineering tactic to trick users into visiting a harmful site. The PDF also contains a large number of external links, suggesting it's part of a link farm designed to manipulate search engine results or distribute malicious content. No scripts were extracted, but the primary malicious action is the redirection via the embedded 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.cc/pify?keyword=bullying+in+schools+essay+pdf
    • http://files.talesbyataillesscat.com/uploads/1/3/1/0/131069899/8407331.pdf
    • http://nomek.emmanuelsa.com/uploads/1/3/1/3/131378950/punuzifof.pdf
    • http://xarozovik.fijileaks.com/uploads/1/3/0/8/130814328/dolulomalozulubol.pdf
    • http://files.innerpiece.nl/uploads/1/3/1/4/131453540/6468fc4ee.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/anlauttabelle_flex_und_flora.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/tuxiwezisilizubexumev.pdf
    • https://cdn.shopify.com/s/files/1/0440/6486/6469/files/xafofujidozerokemex.pdf
    • https://cdn.shopify.com/s/files/1/0433/5108/1114/files/accretion_dilution_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/dujewizibunediru.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2399/files/tisakoritomoziriwulom.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/tusebutajisikolagisina.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/91486594569.pdf
    • https://cdn.shopify.com/s/files/1/0436/7617/2441/files/automation_testing_selenium.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4343/files/7637441973.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/752171969.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_off000077c6.bin
7b910b74ed8cd032a87f329e29b8d8889217c3131f703a412d5f53eed3e19741		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C6 5472 bytes
font_01_sfnt_off00008a6b.bin
0d2e0688119668ad8ce5ceaa5d094da834154c1ab9935d0475de18c227966b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6B 10188 bytes

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