Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db86bafc4b8dd05…

MALICIOUS

PDF

38.0 KB Created: 2020-09-07 10:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 760f7d04704ff3224e9bf9ff2aa9cc41 SHA-1: 607377936888b11d2b2339999de29025c9d06241 SHA-256: 4db86bafc4b8dd0520031a9bd7855c27806bb98a72fbffb36fae6137bf54726b
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 firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of a link farm suggests an attempt to distribute malicious content or conduct phishing operations.

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.club/pify?keyword=guided+reading+level+dork+diaries
    • https://static.usrfiles.com/ugd/0c4177_7a4bc080490644d59efdad2b457f2282.pdf
    • https://static.usrfiles.com/ugd/097bd5_782a174472be4838bbaa602fc768c6dc.pdf
    • https://static.usrfiles.com/ugd/a771bd_97b7d8e18c614f6d941aca9589ad2302.pdf
    • https://static.usrfiles.com/ugd/cfa91a_1de9cb08131643c6bbbcf4d7519577b3.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_5542df5437e84e04b83e9f1602f68dbc.pdf
    • https://static.usrfiles.com/ugd/d48fe3_7d84a096f33049f99223aca6d66cc2bb.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/gojinog.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0454/files/jemusunebizib.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/breasted_history_of_egypt.pdf
    • https://cdn.shopify.com/s/files/1/0439/1570/6523/files/pitetexojoxivekapapigireb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0342/0570/files/76299251603.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xokuwunojuvilil.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/movement_disorders_authors_guide.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_off000055bc.bin
455bea9042db8ea78e8d090a4f6ac0e7369ec176289ebd6d9f4b5449764b3622		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55BC 5148 bytes
font_01_sfnt_off00006758.bin
a9663bdd08c8979626fc7e93d1cab9bf1d4af41f247ce9f2f8f00cf8b53639ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6758 10412 bytes

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