Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ef608a843e7160…

MALICIOUS

PDF

33.1 KB Created: 2020-08-25 00:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6297beb5ac11fd8274e9562b1e77d939 SHA-1: 8632faf50ffa4bbe40b749bf99b80d0332bb6473 SHA-256: e2ef608a843e716019e48e49e03b5806f4424add1f46d4a2637430c1b58a0edd
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, masquerading as an answer key to lure users. One of the primary links, 'https://ttraff.cc/pify?keyword=mindtap+answer+key+sociology', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links pointing to Shopify domains, likely part of a link farm to improve search engine ranking for malicious content.

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.cc/pify?keyword=mindtap+answer+key+sociology
    • http://jomixupol.jasminmujanovic.com/uploads/1/3/0/8/130813453/logeb.pdf
    • http://files.christinajewels.com/uploads/1/3/1/3/131381640/6c079b131de0b.pdf
    • http://tipawivez.andersonoverheaddoors.com/uploads/1/3/1/3/131379255/tapigokaf-kimup-xufavine.pdf
    • http://xixojem.newjerseyalmanac.com/uploads/1/3/1/3/131379730/tozamizaxele_nofelid_rixow.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/18611501383.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/gofuwoziwupo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/kofezasojux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7707/5108/files/cardiovascular_system_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/alg_2_antrag.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2559/files/zidikelozozofitoxuvam.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/90373677199.pdf
    • https://cdn.shopify.com/s/files/1/0431/2589/9421/files/72750593622.pdf
    • https://cdn.shopify.com/s/files/1/0436/0755/6258/files/runejoke.pdf
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/vemezi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5104/8357/files/40967608999.pdf
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/temokad.pdf
    • https://cdn.shopify.com/s/files/1/0434/4093/0968/files/wunobir.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/peritenubutujivama.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_off00004528.bin
735f8b600cb9ef35a7ba0961b049d13836d1a142533e2e397d259edb38b56ed0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4528 5504 bytes
font_01_sfnt_off0000580f.bin
50f1342dc478814017b68c6316f9a71282c9930ef19d7f0f664a42feea96465d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x580F 9160 bytes

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