Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6d063b1d8c8740…

MALICIOUS

PDF

60.8 KB Created: 2020-08-04 11:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e22cb5a1eb127dbe6ef96fc1307e67f SHA-1: a2a612d3caa91707dd5b19b357216453427bf91f SHA-256: 4b6d063b1d8c8740f502eeba517f77e5a7c1d72006ca1a5ff60213a29e517c02
120 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector. The document body, though heavily obfuscated, contains text related to 'english lessons pdf' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious URL identified is https://ttraff.com/pify?keyword=original+effortless+english+lessons+pdf.

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=original+effortless+english+lessons+pdf
    • http://files.quiltbymachine.com/uploads/1/3/2/7/132740804/motaza.pdf
    • http://tomuxa.onurokcal.com/uploads/1/3/2/7/132710797/33050b5df35c46.pdf
    • http://files.mchsapchemistry.com/uploads/1/3/0/8/130813489/galenorox-jupuwamogoruf-pugusu-sodinulosil.pdf
    • http://pukoluten.puremichiganminiaussies.com/uploads/1/3/1/6/131637136/ce03018245ffab.pdf
    • http://files.bambooartscenter.com/uploads/1/3/1/8/131857071/pujeriwetid-napofemerumaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9121/files/tizokiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/21635904030.pdf
    • https://cdn.shopify.com/s/files/1/0431/2478/5319/files/migulinubugupoxulorubasol.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/vasuxosawedef.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/82635807748.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/suradidititivavuvifug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4499/files/kixesox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/gilelodovosafarifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2858/files/zunatinawununidit.pdf
    • https://cdn.shopify.com/s/files/1/0437/0055/1830/files/vevilaludijigo.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_off0000a95f.bin
6c55c7ff7650e594cacefcab3dfd8e259de70a4c478e110dcd2f2d301edc77b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA95F 5328 bytes
font_01_sfnt_off0000bb77.bin
33cb20c1d989578567094ee79c88015bf2a74b9edb8880603d106460b95864f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB77 15876 bytes

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