Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d6259f073fe80f…

MALICIOUS

PDF

44.8 KB Created: 2020-08-08 20:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c14b25ec15731a680ae4fffcdbff0199 SHA-1: 604bb4d21c16986bbcef44c0b369ec28880d5044 SHA-256: 37d6259f073fe80f3024fb664357e6c402793c4f5c7243ee4a02c96af20605a0
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a redirector link to 'ttraff.cc', which is known malicious infrastructure. The document body itself contains obfuscated text and the malicious URL, suggesting the primary purpose is to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=the+norton+anthology+of+african+american+literature+online+pdf
    • http://files.mwdesigning.com/uploads/1/3/1/1/131164063/zemowid.pdf
    • http://files.loveroomwedding.com/uploads/1/3/2/7/132710763/7070545.pdf
    • http://files.beso.co.nz/uploads/1/3/0/7/130738554/xamobaligupawi.pdf
    • http://files.challengenavitus.org.uk/uploads/1/3/1/4/131453620/4525760.pdf
    • http://files.radomirtodorov.com/uploads/1/3/1/0/131069961/xurefetala_ledemume.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/vofuwosukolumawasuguwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/98483134047.pdf
    • https://cdn.shopify.com/s/files/1/0434/0678/6725/files/dufirowibutefisivu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0395/9720/files/xugojorivotafabonivogimi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/adjectives_order_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vofekofunore.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/air_conditioning_systems.pdf
    • https://cdn.shopify.com/s/files/1/0444/2734/6086/files/les_collectivites_territoriales_en_haiti.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/bls_provider_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/i_wanna_rock_twisted_sisters.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/fezixetafuwajajozo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/59783805569.pdf
    • https://cdn.shopify.com/s/files/1/0440/6758/6213/files/materi_akuntansi_keuangan_kelas_xi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3608/1308/files/14988225704.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6854/files/basic_english_grammar_lessons_for_beginners.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_off00006f86.bin
7ff330188748e5b143419a93ca15655e8e4b68df1d17dc9cb7f90a4bc13b508a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F86 5440 bytes
font_01_sfnt_off000081eb.bin
9022cc4dfce92876ecadca8ec04a99667cefbe74f807725575a35683bc944b5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x81EB 10420 bytes