Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0278a680979ee1…

MALICIOUS

PDF

46.1 KB Created: 2020-08-11 23:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab7f3967cac748238d00b8bbd7f7733f SHA-1: f0551593b79c19bd28b8fd731035e0e897519da2 SHA-256: bf0278a680979ee10a4203ed3626c95fcd9df7dad4eb1a5716bb24b7bbfe31b9
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, and one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains references to educational materials and the malicious URL, suggesting a lure to trick users into visiting malicious sites. The ML classifier strongly indicates maliciousness.

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=igcse+computer+science+workbook+pdf
    • http://wefop.pushpamalextalaiver.com/uploads/1/3/1/3/131398097/da50a3a70c6c1a.pdf
    • http://files.theportlandtowingcompany.com/uploads/1/3/2/3/132303353/fajor_gojerogitid.pdf
    • http://files.atomicnature.org/uploads/1/3/1/4/131483097/gururip_gosaker.pdf
    • http://files.cwgtshirts.com/uploads/1/3/2/8/132814624/ganabife.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/tazuwoxalukekidetunabigu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8845/files/gasekevukawupuxumuna.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/kuzedaxarajedarifila.pdf
    • https://cdn.shopify.com/s/files/1/0429/1297/2963/files/11557754338.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/90081731924.pdf
    • https://cdn.shopify.com/s/files/1/0431/3645/0714/files/mozetijefirope.pdf
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/tekkit_legends_sphax.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/4523212701.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/37194680791.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/aaron_lewis_country_boy_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/4371/6262/files/48311887296.pdf
    • https://cdn.shopify.com/s/files/1/0432/3059/3186/files/pofebezonatuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/jinoxudenewifadorod.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1074/files/40832305364.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006880.bin
5c1700b0be6c0d85355e592d3eae3581b14fefdb631b0473f7dc1a10012c9974
pdf-font-stream PDF embedded font (sfnt) at offset 0x6880 5348 bytes
font_01_sfnt_off00007aac.bin
a6898d4957111e06401c2291fb545ca6a3035d4b676360303661cfba5d69553d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAC 9980 bytes
font_02_sfnt_off00009cb2.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB2 4324 bytes