Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8cc71b39e6fdd0…

MALICIOUS

PDF

68.2 KB Created: 2020-07-30 05:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 461d7ce7e7bd5bcc396fb632e99cbfa3 SHA-1: 88f54986fe665be2757a2449fda5035c9569a114 SHA-256: 4b8cc71b39e6fdd0609249ac3267c108dbd36956ace1f7c67538ce5eed933a50
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, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=social+learning+theories+pdf', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be related to academic content, likely a lure to encourage clicks on the malicious links.

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=social+learning+theories+pdf
    • http://files.galactikonsciousness.com/uploads/1/3/1/6/131637081/zopiratidinuxak.pdf
    • http://files.137point5bodycare.com/uploads/1/3/0/7/130775387/b1df9b79.pdf
    • http://files.wcpreschoolva.com/uploads/1/3/1/3/131383954/2722490.pdf
    • http://files.keeputopiabeautiful.org/uploads/1/3/0/8/130814535/xirote_wunowalemin_kijomat.pdf
    • http://files.adamhager.com/uploads/1/3/0/7/130740524/19bdbcc11b.pdf
    • http://files.kee
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/bivoxaforalupuzagu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/vapeximukotowisuxojawof.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/95491009207.pdf
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/birafelilapixaselimaveg.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/regiwugisopave.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/5356724392.pdf
    • https://cdn.shopify.com/s/files/1/0437/7722/8957/files/noxifapipaliruxofabulati.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/22332782065.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/patebekomarabujurugaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8333/files/rotexul.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9666/files/10416357281.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3637/files/salimuvedepadomufitoli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9249/2963/files/mejaruzakadudojavemipun.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_off0000cee5.bin
b7024f6a91a6cbef0ad72c43c0e61dad44d009974b0fb6d594fc6e2337f1cf38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE5 5308 bytes
font_01_sfnt_off0000e0ce.bin
eaaa2d567a87d77ac61dcca0da4095712ac73e7ebb8119a9482ef5fe0dfdf1e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CE 10140 bytes

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