Malicious PDF — malware analysis report

Static analysis result for SHA-256 428e761a9bfced44…

MALICIOUS

PDF

44.2 KB Created: 2020-08-19 08:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d3b8b61e5df5349f12790219fcea60d SHA-1: bb715fa82c81ced0275122bdfcee2cd81ec459a2 SHA-256: 428e761a9bfced442d4fe851f34d2b01cbcbd0e04b494ae49f70cd84f0eb8cf4
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

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=2000+bayliner+capri+1850+lx+manual
    • http://files.mushroomsandmore.net/uploads/1/3/1/0/131070434/8886f0b0.pdf
    • http://files.corporatechilllout.com/uploads/1/3/1/3/131384636/kapebef.pdf
    • http://wevuzor.futurefitness4allofyou.com/uploads/1/3/1/4/131454165/sejogunekizema_bosepi.pdf
    • http://files.seshalloween.com/uploads/1/3/2/8/132814305/8009152.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/vujololorafolafemijemi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/renadalotejewilitamiwav.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/traitement_blennorragie.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9073/files/reading_people_s_body_language.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/84718526603.pdf
    • https://cdn.shopify.com/s/files/1/0439/0181/2888/files/vefesuposonubofamegubeses.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xidegafizupewutuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/pid_c_code.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/76746245084.pdf
    • https://cdn.shopify.com/s/files/1/0432/9799/6960/files/compliance_risk_management_plan.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_off0000613a.bin
0ead71b70458e4983dfe0b2cba77a7c74ae4ae9fd1cb361123fffdd3ebfaa521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613A 5760 bytes
font_01_sfnt_off000074bc.bin
cb1a5a7aa5c8c572a3fcccf3db21b294b7d04644775520762881d5b9df749828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BC 15328 bytes

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