Malicious PDF — malware analysis report

Static analysis result for SHA-256 8698ad5157848a88…

MALICIOUS

PDF

43.6 KB Created: 2020-08-20 21:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b87e547365be95fd2ca2f39eb763ec32 SHA-1: 00dc6fcf1ce6011eac3ac0dfde65691c1b6b7558 SHA-256: 8698ad5157848a887938ebac6ccd397f8941f5d6192fffec7fba6c1f9f41edf0
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector hosted on 'ttraff.com', which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'grade 4 math word problem worksheets pdf', suggesting a lure to disguise the malicious link. The PDF also contains a large number of external links, many pointing to Shopify domains, likely part of a link farm to improve SEO for malicious content.

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.com/pify?keyword=grade+4+math+word+problem+worksheets+pdf
    • http://files.jenniferrollin.com/uploads/1/3/1/6/131637635/suron-zonepo-gudobigegepekup.pdf
    • http://wukopiko.spiritual-research-network.com/uploads/1/3/0/8/130874488/nudekefenosumegaponu.pdf
    • http://files.treetogrow.com/uploads/1/3/1/6/131636676/luralizinikabam.pdf
    • http://files.sbwga.com/uploads/1/3/0/7/130740069/zemevamadevufex.pdf
    • http://disanidis.chapel-associates.co.uk/uploads/1/3/1/3/131383544/637446.pdf
    • https://cdn.shopify.com/s/files/1/0437/3400/7973/files/37854456065.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/lapevin.pdf
    • https://cdn.shopify.com/s/files/1/0429/2630/9543/files/lagu_barisan_para_mantan_reggae.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/goxubeteb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/66198681626.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9320/files/12577631121.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/nuvak.pdf
    • https://cdn.shopify.com/s/files/1/0435/2940/4567/files/fusujiraxedavup.pdf
    • https://cdn.shopify.com/s/files/1/0439/3687/4651/files/pozizufidopowebug.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8994/files/water_fountain_alec_benjamin.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/binomial_heap_in_data_structure.pdf
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/tejupen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.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_off00006a91.bin
b0abb720e66eb7655b267e98217bc7c317deacb1906dd78a8979a0b4bf9f0224
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A91 5696 bytes
font_01_sfnt_off00007dea.bin
48380ee3499b54432334b356d1d3c7d5a8d5c2687ffad4f02d722c7bec7702ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEA 10380 bytes