Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3100e1247e4bf7…

MALICIOUS

PDF

45.4 KB Created: 2020-08-30 21:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 731fd7eee748d2de8fc37cc0b193291d SHA-1: 971a98816ed8da1038cbe698466f44febaeecb90 SHA-256: ac3100e1247e4bf72fc63509fd163eaeba8d8e60dda5a4964bedb05561d56e56
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as search results for academic papers, designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/wix?keyword=encyclopedic+dictionary+of+mathematics+volume+2+pdf. This technique is commonly used for SEO poisoning and phishing campaigns.

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/wix?keyword=encyclopedic+dictionary+of+mathematics+volume+2+pdf
    • https://static.usrfiles.com/ugd/c068f8_88f71a19348e4c788bbf9a665f21fdf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf389887f0244118b4bec65dfc8c4ee2.pdf
    • https://static.usrfiles.com/ugd/e73fea_d965d808e1fa414786dc8419bb614b82.pdf
    • https://static.usrfiles.com/ugd/d78803_3676c55a80e244f780344f969474fb9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_6179b3ed0bff4befaad311c9379ff390.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1c71de0f6774347905c42513b28b317.pdf
    • https://static.usrfiles.com/ugd/48d9a1_5510a00040d645288408e55eb92ef32a.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/silenasezobobewotek.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/jvc_kd-_sr41.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/37838529852.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/zuximodopidoxem.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/call_of_duty_ghost_pc_game.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66691602327.pdf
    • https://cdn.shopify.com/s/files/1/0430/9273/8201/files/dexediluvizegor.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6396/files/808747319.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_off0000623c.bin
daaf6d03b92181f1b4ac104a69e089b79c35aadb9bf8e542330f11ae78368097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623C 4648 bytes
font_01_sfnt_off0000725f.bin
e671c0d3996acdd902ec2e083c0fc2e86cae31660e46679c23c3bd648419aae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725F 5644 bytes
font_02_sfnt_off00008575.bin
7995e4a839e582a16c3ae1da54002e033e87a95ade6ec74440ae3e3e9101f0a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8575 10008 bytes

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