Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c623eccc2ca9088…

MALICIOUS

PDF

47.2 KB Created: 2020-07-30 17:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9994d3d914f8cbf2e46d37720fb96572 SHA-1: 50d7b270c661bdcc588de8cba52435ac5b94acbd SHA-256: 3c623eccc2ca9088ca7c0cc2e1c5ceec3f7398b26c32130ceaeebb38dda46033
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm used to obscure malicious destinations. The primary malicious URL identified is a redirector, suggesting the document's purpose is to lead users to harmful content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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=adestrar+cachorro+filhote+pdf
    • http://files.stylish-mommy.com/uploads/1/3/1/4/131483201/9693846.pdf
    • http://files.ospan.org/uploads/1/3/0/7/130775655/zexepivizelumukizus.pdf
    • http://files.kmphotographyma.com/uploads/1/3/1/4/131453100/5271413.pdf
    • http://files.ride-ctha.org/uploads/1/3/0/8/130814168/kilit_zegetalizolid_sevesamove.pdf
    • http://files.robspechtart.com/uploads/1/3/0/8/130814516/govabul_pokesoxutoreve_fafavevukeb_zidawevopunu.pdf
    • http://files.robspechtart.com/uploads/1/3/0/8/130814516/govabu
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/lexebabavunogisexizop.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/xelokuxuwulegotakobiwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1184/0927/files/12366968412.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5175/files/60522862880.pdf
    • https://cdn.shopify.com/s/files/1/0437/4410/0506/files/genijifivepeposinug.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/luvituzonodadobisonuboke.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/nemasusixid.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/38940472037.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/kukositagotokuxikoju.pdf
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/39305943817.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/94409037148.pdf
    • https://cdn.shopify.com/s/files/1/0439/3641/5899/files/33132822243.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/22736120140.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_off00007b2d.bin
c8e440d6fd9c204aa24863a4d45d66fea5ac28113b058806e033e0cd1b9d355f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2D 4916 bytes
font_01_sfnt_off00008bf2.bin
f8c4ad88bf4e90a26cd926d1e43317ab0569bc2697ba52a4c88ea40222d9a1f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF2 9932 bytes