Malicious PDF — malware analysis report

Static analysis result for SHA-256 29448041be314e17…

MALICIOUS

PDF

39.8 KB Created: 2020-09-20 07:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7804b9eadb927b204354765d2615861 SHA-1: a242ff533347974027e34abc3007ecb7d969abef SHA-256: 29448041be314e175a527f828f7c4a053452014f3d0f2ede88f81c31ac8d4038
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a large number of embedded links, many of which point to external PDF files. One prominent link, 'https://ttraff.link/wix?keyword=lexington+district+4+school+supply+list', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest a link farm or redirection tactic to obscure the ultimate malicious destination. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=lexington+district+4+school+supply+list
    • http://wurumap.calgeobruins.org/uploads/1/3/0/9/130969061/8c020a6d.pdf
    • http://files.adventurescomingtolifeinwords.com/uploads/1/3/0/8/130874474/fawevura.pdf
    • http://gegawok.artsmartmanila.com/uploads/1/3/2/6/132682156/fuwakunisojob-fifaduzijaluj-xogapabatade.pdf
    • http://tapofafop.lancerpep.org/uploads/1/3/0/7/130739046/kekunuboj.pdf
    • https://7db2078f-cb69-4cd4-8438-49c683143599.filesusr.com/ugd/38eac1_2675762e0d9b4c5c948c899a3d4450fa.pdf?index=true
    • https://7458d102-219a-49eb-9a31-28a9f66fb0c2.filesusr.com/ugd/3fb742_9e57279b4af843fe8707daad2c0992fb.pdf?index=true
    • https://a53b9545-f046-4882-b40f-b04286f54619.filesusr.com/ugd/54e393_fefaa2a8cd2848bbb9a15a422274dcb3.pdf?index=true
    • https://85f019c9-2ce7-4d15-993c-dcf09a29981b.filesusr.com/ugd/49be48_8be27eaf603d450895c59476f8005f57.pdf?index=true
    • https://b313cec4-3b41-4087-9dfa-0a425f193eb4.filesusr.com/ugd/3e7897_e313af296cdc48cfaa9335b86d3b2b77.pdf?index=true
    • https://73ff51ec-ed02-43dd-9995-49a7556f2843.filesusr.com/ugd/17ce20_3581838cd45f4f8eac77009000886e92.pdf?index=true
    • https://efd12759-9db8-43a0-8434-16d9b1e35aaa.filesusr.com/ugd/af0aa9_c39dc56336fa4fe4a6abcccc6d339666.pdf?index=true
    • https://89a9dd59-3e1f-40f9-984d-aaa2541f855c.filesusr.com/ugd/ce4b7c_42002f2d354e47b18038967cb1fed4eb.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/1617/5263/files/99883030068.pdf
    • https://cdn.shopify.com/s/files/1/0434/3778/5240/files/baxeloxulujugebon.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/buying_doctor_fish.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_off00005ce8.bin
6cbe8183ba508199e1a72805d251721386ddc5d9446aa58fa9e555478c42ce1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE8 5324 bytes
font_01_sfnt_off00006f1d.bin
19765098e53caa669c06d44b8f22ad7808e1a19c236339577451bdef16d0e89d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1D 10284 bytes