Malicious PDF — malware analysis report

Static analysis result for SHA-256 381a58bfccf889dc…

MALICIOUS

PDF

48.7 KB Created: 2020-08-09 19:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1cf3426e5c81d1bee92f2f8cd5fdb12 SHA-1: 0feb4b6914be350a2ec34babe34c9320efe8217f SHA-256: 381a58bfccf889dc5d82daad8a5c5322fe1a3e80a3a6293b1185cd1d8f9bbae5
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which are part of a link farm designed to obscure the ultimate destination. One prominent URL, 'https://ttraff.com/pify?keyword=sociopath+checklist+pdf', is identified as a malicious redirector. The document body, though partially corrupted, contains the 'sociopath checklist pdf' lure, reinforcing the malicious intent of directing users to potentially harmful content.

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.com/pify?keyword=sociopath+checklist+pdf
    • http://memoxa.singingattheclothesline.com/uploads/1/3/1/6/131606289/6a454502c89ce01.pdf
    • http://files.bjscholarship.org/uploads/1/3/1/8/131871414/todak.pdf
    • http://files.yichaorui.com/uploads/1/3/0/7/130775490/bbd43a.pdf
    • https://cdn.shopify.com/s/files/1/0440/2325/1094/files/factorising_quadratic_equations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/4741/8016/files/jevolibonagiputezen.pdf
    • https://cdn.shopify.com/s/files/1/0435/5234/2184/files/daroros.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/gosufogisobefugibogobudit.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/materi_agama_islam_kelas_xi_semester_1_kurikulum_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/0720/3739/files/97729219020.pdf
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/91873824560.pdf
    • https://cdn.shopify.com/s/files/1/0432/1515/9458/files/45655367169.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/31550737770.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/amyloidosis_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/38360059685.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/2020_real_estate_business_plan.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_off000082ab.bin
cbc32f789cde4b3eb19249c1b59a23db75badb05589df97e3827cf7b5161888e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82AB 5312 bytes
font_01_sfnt_off000094c0.bin
669ea349b803a496c968d487a3e3f251c752204b1d7d3fb684c8a1dd3e1f0a50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94C0 9904 bytes

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