Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0e0cbde41b75b8…

MALICIOUS

PDF

40.4 KB Created: 2020-08-20 06:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4331b96f8aca6770c6cb0811e0cb21cd SHA-1: c1c6ba5df36e0b1f6dd13ddd01182c4d859ffe4b SHA-256: 4c0e0cbde41b75b8d7b1ce499a5e676d55bd3ee9faa80a57280574210a55c599
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. The document body, though heavily obfuscated, contains text related to 'descriptive writing worksheet grade 5' and a URL that matches the malicious redirector. This suggests a social engineering lure to direct users to malicious infrastructure.

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=descriptive+writing+worksheet+grade+5
    • http://files.justuschildrenbooks.com/uploads/1/3/1/1/131163859/2d758f0a1.pdf
    • http://xosasud.loveofleos.com/uploads/1/3/0/7/130740080/68607602474e.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/rozududojuxan.pdf
    • https://cdn.shopify.com/s/files/1/0444/0922/5382/files/bike_frame_design.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/24259347947.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/oblivion_character_overhaul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/dedapaxadujot.pdf
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/larag.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/64170448689.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4359/files/jovised.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9203/files/donakaduzedafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/25978587190.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_off00005da6.bin
19ead1ecb858964f0814be75ae09b9e2865cee0bbe96c29deb03e0e60c14a658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA6 5644 bytes
font_01_sfnt_off000070ea.bin
2f83a2cb30f1de4403d2928008b918eca0efe51e35dbbc9b012e612addf1aa8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70EA 10540 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.