Malicious PDF — malware analysis report

Static analysis result for SHA-256 3804fbc802dfa0c1…

MALICIOUS

PDF

55.4 KB Created: 2020-08-06 19:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91487700973c914327c093295523c87d SHA-1: e689669b65da02a160c7a79e70bf47cab1ebba34 SHA-256: 3804fbc802dfa0c1834147149e96f47d562b4b967954158c6f7a13e1bff05a1b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body, though heavily obfuscated, contains references to academic material and the redirector URL, suggesting a lure to trick users into clicking malicious links. The primary attack pattern involves redirecting users to malicious infrastructure disguised as legitimate content.

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.com/pify?keyword=anatomia+de+cabeza+y+cuello+quiroz+pdf
    • http://files.supportingsuperstudents.org/uploads/1/3/0/8/130874175/kurupapuforexevij.pdf
    • http://wopufe.oklahoma-chapter7.com/uploads/1/3/0/7/130776757/4152521.pdf
    • http://files.arewordinglife.com/uploads/1/3/0/7/130740056/silonuranovog_jirurol_rawedasa.pdf
    • http://files.themoveablechurch.org/uploads/1/3/0/8/130874128/9175303.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6119/files/lafuwosoximadikiwomo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/audit_report_writing_skills.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/11296253339.pdf
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/hallelujah_square_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/riwubuwirapiru.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/35962228359.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9121/files/tizokiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/pomupovi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0232/1307/files/banking_chronicle_magazine_september_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/kuwuluxekipuvutakebeta.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/86053683843.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/varasixubajapako.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_off00008611.bin
8ae7bdb1a904ce3b22b2500d4913d50b2aa3f1920fb376d9a1fc57e4a530fe62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8611 5532 bytes
font_01_sfnt_off000098d7.bin
d358b9a2860e452201deca06628f3dfe2fb21c3c69bab8041cd79bd43052263b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98D7 18244 bytes

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