Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a435eb5383def2…

MALICIOUS

PDF

44.1 KB Created: 2020-08-14 21:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe0ae08c9ab6bc736eb71b96b3fa8baa SHA-1: 92fc48f72a86d792fbe1ab32562f5cc246b803d6 SHA-256: c7a435eb5383def229c6bc3775c84d237a1eeee8406f4c46465ccd38474e3091
120 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through its extensive use of embedded links, with a critical heuristic identifying it as a PDF link farm. One of the primary links directs to a known malicious redirector, ttraff.com, suggesting an attempt to lure users to malicious sites. The document body, though heavily obfuscated, contains references to the redirector URL and other external PDFs hosted on platforms like cdn.shopify.com, indicating a coordinated effort to distribute content or traffic.

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/wb?keyword=infinitive%20clauses%20pdf
    • http://files.thejoshdunneorganization.org/uploads/1/3/2/3/132302907/mabexanibizo.pdf
    • http://files.queensmedreview.com/uploads/1/3/0/9/130969847/6589554a3.pdf
    • http://files.meiraacademy.org/uploads/1/3/1/4/131453194/sefexojarujorojus.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8360/files/avalenthinanavo_song_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0435/9743/0941/files/sezujatodufejopagofurid.pdf
    • https://cdn.shopify.com/s/files/1/0429/1624/9767/files/hz_to_khz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/77376229517.pdf
    • https://cdn.shopify.com/s/files/1/0435/3146/8951/files/jorupalorogaloperigutode.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/burega.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/business_vocabulary_in_use_advanced_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/33088575138.pdf
    • https://cdn.shopify.com/s/files/1/0438/1389/6352/files/20762568849.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/semegagodesupevejedira.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nitupalakisotubawu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/13737006541.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/420785026.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/ielts_answer_sheet_reading.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_off00006ec9.bin
91a0851dfb1a4c1632e99a866ed835033767be315547b5660d508f2dd5e63ccf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC9 5052 bytes
font_01_sfnt_off0000800b.bin
46d91fbecadf06c40bd978a9719c1eada9a3edea2e5c0c86e18672c1fc9104cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x800B 10332 bytes