Malicious PDF — malware analysis report

Static analysis result for SHA-256 545a481b1e2c9130…

MALICIOUS

PDF

47.4 KB Created: 2020-08-23 17:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92766d1d54ddb5181374ceec06d39a83 SHA-1: b0d8f39361b3ae6368d781a18323092b5f250f47 SHA-256: 545a481b1e2c9130616ac0e106b1c48a13e31a804c18a37721674caca5ccee44
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=android+developer+studio+for+windows, which likely serves as a lure for users to download potentially harmful software. The document body, though heavily corrupted, contains references to the lure and the redirector URL.

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=android+developer+studio+for+windows
    • http://files.achildsworldtherapy.com/uploads/1/3/1/8/131872054/wetutebulutar.pdf
    • http://zibor.alexanderashby.com/uploads/1/3/0/9/130969959/mewukivozefagu.pdf
    • http://zoreze.canadiancraftcompany.com/uploads/1/3/0/7/130776855/d75f5ff.pdf
    • http://navibupaj.chefjarvisbelton.com/uploads/1/3/1/3/131398504/2554334.pdf
    • http://files.johnfolley.com/uploads/1/3/1/4/131452991/sunosivul-dotoxep-ketusajaxewel-sopigogoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/raves.pdf
    • https://cdn.shopify.com/s/files/1/0447/1577/0012/files/oscillator_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5465/files/accounting_journal_entry_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4415/files/40008637492.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/the_5th_wave_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/gikinogajekubigil.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6643/files/6262603488.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/xuvuvag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0440/6794/6648/files/9286384126.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/fda_guidelines_for_equipment_qualification.pdf
    • https://cdn.shopify.com/s/files/1/0432/9409/7576/files/german_language_books_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/pinosoda.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_off00007837.bin
c35c99e923e8b073c21afd54f52f997bd66022ff9ec848d3f18cdd7d60db10e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7837 4968 bytes
font_01_sfnt_off0000893f.bin
b7f2f47ff006f7a93305aed401dd42a35afde9511520de207bad2be93fe51ecf
pdf-font-stream PDF embedded font (sfnt) at offset 0x893F 11576 bytes