Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7681b2a5df7e9af…

MALICIOUS

PDF

41.2 KB Created: 2020-08-21 16:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a217b74b046ba43db7d8169ac486fa6 SHA-1: 4b8b981126bcea174c42573ce10dcba0a445aa6d SHA-256: d7681b2a5df7e9afd91d96c138c5708b803f44fd4d373b44a4b5cf99096ac409
160 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external links, suggesting a link farm or redirection tactic. The document body's content, though garbled, includes references to 'Winrar cho win 10', indicating a lure for software. The presence of a password archive lure heuristic further supports the idea that this document is designed to trick users into downloading or accessing malicious content, likely through the primary malicious URL.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=winrar+cho+win+10
    • http://miduvidus.driftriders.org/uploads/1/3/1/3/131383651/8551874.pdf
    • http://files.ancientwavestudios.com/uploads/1/3/2/7/132712508/mivoduvazebeji-niludojogakoku.pdf
    • http://lexan.raschoolofexcellence.com/uploads/1/3/1/4/131453870/betasuxox-sigesixudo-manikal.pdf
    • http://files.clemsonchronicle.com/uploads/1/3/1/3/131378990/pavefef.pdf
    • http://tulipel.installatiebedrijf-altena.com/uploads/1/3/1/6/131636664/a426c2b64.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/occupational_therapy_intervention_for_autism.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/37351550271.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/ziguroxisuzisakomosebig.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/93110838553.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4637/files/7623234547.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/61385595252.pdf
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/56698194306.pdf
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/8656073774.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_off000063db.bin
380999f4fea126862e2ae4e8d023f5d10cda47a2df73b0837b1077c11a4c7c0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63DB 4976 bytes
font_01_sfnt_off000074d1.bin
58a9ec28393db33d60089ff81caa96af86b97026ff35b413b71252a89a212dcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D1 10932 bytes

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