Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c11d0d6c42461d…

MALICIOUS

PDF

43.8 KB Created: 2020-08-31 05:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85f3d113ccf24a719994bf3dbb25510c SHA-1: 48c68261b20d4cc806bf79015ea561010db9a5dd SHA-256: b2c11d0d6c42461d64a77c738005c3a5d22e3f3e2db16cecddbf86b2718dcab0
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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/wix?keyword=accounting+dictionary+pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4882/files/bollywood_movies_mkv_hd_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/tippmann_a5_egrip.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/lirituzamuzax.pdf
    • https://cdn.shopify.com/s/files/1/0436/5916/5849/files/quick_login_facebook.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1abaf51e8dc428199e380fbae2a43e3.pdf
    • https://static.usrfiles.com/ugd/9e41f0_dfe90ee2c09c4d508fd24fdfe00c7b2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_96ca8690fda74c27bbbcaf388d325fc6.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/sarerowotukubipip.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/nusuwotawizaweboli.pdf
    • https://cdn.shopify.com/s/files/1/0428/2266/4348/files/88180049137.pdf
    • https://cdn.shopify.com/s/files/1/0429/4171/0499/files/komadebalomeneboxe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/pedal_notes_trumpet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7388/6613/files/manejo_de_ansiedad_y_estres.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_off0000627e.bin
c80b78191c6649a9b16611c21877e4d300a35f97eae8c3f6c669aac24a897367		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627E 4968 bytes
font_01_sfnt_off0000736e.bin
cffb1374321fb88a0bf9c04ee806f12c86940eb5703fb967e78b678a81e4e1d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736E 9780 bytes
font_02_sfnt_off000094a1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94A1 4324 bytes

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