Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc2775189b86067…

MALICIOUS

PDF

37.6 KB Created: 2020-08-22 01:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52ad3893a3e09e69d19bc9e4aafb9d5c SHA-1: 819ac53e2918ce4f2a9c6124cdd4a444052ec822 SHA-256: 7dc2775189b86067a54985105730c6ef2fa248a5be2bcdc7aa333dfa6d0367d3
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is the primary attack vector. The document body, though corrupted, contains the text 'Monster dichotomous key worksheet answers' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of a large number of embedded PDF links further supports the malicious redirector pattern.

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.cc/pify?keyword=monster+dichotomous+key+worksheet+answers
    • http://mivute.676kittyhawk.com/uploads/1/3/1/0/131069935/7278050.pdf
    • http://files.oprpac.org/uploads/1/3/0/7/130776795/vidulegopaxoze-gaguvavujat-sufikanonerak-xagugevo.pdf
    • http://files.theroute92.com/uploads/1/3/0/8/130873973/zuguxizamuri.pdf
    • http://files.sandysfashionsformen.com/uploads/1/3/0/8/130814055/lilig-pipenatatoxodal-guvajatomerov-busojafigoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/95741491204.pdf
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/wovore.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/goxozaluzezukuzolamimiwin.pdf
    • https://cdn.shopify.com/s/files/1/0439/3032/1051/files/vulkan_vs_dx12.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/bozotudepejefixin.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/1999_subaru_legacy_outback_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/81896035583.pdf
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/vewema.pdf
    • https://cdn.shopify.com/s/files/1/0433/6563/0102/files/96717557910.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6645/files/modetorudexijumukoxera.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045ec.bin
5f726bf3feec9841a2cb7c91efd824de2fe63bb83cf701d0193dfc26da6a4fe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45EC 5292 bytes
font_01_sfnt_off000057d8.bin
641e5e4ba12235abee67e76c83c56233663196c0a74fd0ca2326e161cb0b3cf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D8 10404 bytes
font_02_sfnt_off00007b56.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B56 4324 bytes

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