Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e78c0fc6a239c47…

MALICIOUS

PDF

45.8 KB Created: 2020-08-15 03:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c867e59541a7a2afd708c4c9a61d468 SHA-1: fb2d664a514902594a2a9018293952fe580d4d19 SHA-256: 3e78c0fc6a239c4726da53fa9c975330f70ae37fb6c6e6230263ddde49f670de
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a redirector service. The document body text and a critical heuristic indicate that the primary lure is an 'IELTS reading answer key' which, when clicked, leads to the malicious URL https://ttraff.com/pify?keyword=lesson+for+ielts+reading+answer+key. This URL is likely part of a phishing or malware distribution chain.

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=lesson+for+ielts+reading+answer+key
    • http://pagusede.dermatagespa.com/uploads/1/3/1/0/131070598/5486126.pdf
    • http://files.arielzylberman.com/uploads/1/3/1/0/131070051/jepatopo-dalasuripol.pdf
    • http://files.acuityhearingsolutions.com/uploads/1/3/0/9/130969183/nonaputuxi.pdf
    • http://xujane.markkowaleski.com/uploads/1/3/2/3/132303382/ec54a3.pdf
    • http://zusijibox.dawnamberknight.ca/uploads/1/3/1/4/131437792/pojamajem_bufiv_suginabexixod_sipovipikosoxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5801/1035/files/risc_in_computer_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0437/8951/6962/files/26511862230.pdf
    • https://cdn.shopify.com/s/files/1/0428/8308/8547/files/tikonaso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/agamemnon_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5613/files/xikijebusepakuxuruvota.pdf
    • https://cdn.shopify.com/s/files/1/0438/1674/7170/files/prentice_hall_reference_guide_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/78302154513.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/jotadib.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/darurekuxadapazovikenefo.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_off0000608c.bin
f68803c2908d68103a97a8b3c1821706cc573468d0f20b04c32c0f811286d68b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x608C 5276 bytes
font_01_sfnt_off0000729f.bin
11407a0e7c1e2de924b74e50d6b5f3bd6d7e32f0053a6e226185306cf27beced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 10148 bytes
font_02_sfnt_off00009550.bin
9e1271d681207e96fe60c94df920a27091a957dc81e2614e9e6235263a34fce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9550 16068 bytes

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