Malicious PDF — malware analysis report

Static analysis result for SHA-256 58edda3c394c41d2…

MALICIOUS

PDF

45.4 KB Created: 2020-08-26 23:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c9fece367ee34be0c6f350cf8ec221a SHA-1: e2eba6ba4834d459972a35a67a96b72ad28e573f SHA-256: 58edda3c394c41d24cabc26f5565abb3f2b1e0c8a4392490bdae588a1a125201
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic indicates a malicious redirector link to 'ttraff.com', which is likely used to obscure the final malicious destination. The document body and embedded links suggest a lure related to downloading a specific textbook, 'Brock biology of microorganisms 14th edition pdf'. No scripts were extracted from this sample.

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=brock+biology+of+microorganisms+14th+edition+pdf
    • http://defeve.webdesignin48hours.com/uploads/1/3/0/7/130739616/6951752.pdf
    • http://nijuri.sewchicinteriors.com/uploads/1/3/0/8/130813528/1910382.pdf
    • http://files.campdogginit.com/uploads/1/3/2/7/132740982/visoxiregeremek_povubif.pdf
    • http://weperemad.macherieparties.com/uploads/1/3/0/8/130813528/90811f7e27116.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6285/files/dunijugixurorifodux.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/ginatewugadizidoreregomat.pdf
    • https://cdn.shopify.com/s/files/1/0432/1073/5780/files/apiculture_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/kapavewofasapev.pdf
    • https://cdn.shopify.com/s/files/1/0431/3340/3285/files/latest_tamil_melody_audio_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/5089/2454/files/chennai_express_movie_in_hd_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/hack_wifi_id_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/9328/5277/files/lolijijujatuxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1320/0282/files/zajejotubi.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_off00006ff4.bin
26d2a5f18830ad9320a15a8aa4716f0545f026280f80bc5a87de9189e54bb814		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF4 6064 bytes
font_01_sfnt_off00008477.bin
292f1fa0b5bad8ad7b2efcc1f284d5a94497db9bdc87ea6b9546d7988ea3ca30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8477 10676 bytes

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