Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e54fe59165f3739…

MALICIOUS

PDF

45.2 KB Created: 2020-08-02 17:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99bc5051e9746bceaf5b36457d38140c SHA-1: 370361d9dcf7f5bd8e28b31d5839a563135f89fb SHA-256: 4e54fe59165f37398f2c849dbe13ea2a01ea886cc94910b511e68154db098f6f
150 Risk Score

Malware Insights

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

The PDF contains a clear lure, 'Ase g1 practice test', and embeds multiple external links. One critical heuristic indicates a malicious redirector link to 'https://ttraff.cc/pify?keyword=ase+g1+practice+test', which is the primary indicator of malicious intent. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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=ase+g1+practice+test
    • http://files.stocktonkendodojo.com/uploads/1/3/0/9/130969160/e2d583d1.pdf
    • http://files.templebnaiisraelnatchez.org/uploads/1/3/0/7/130776795/lilirudavutubolepug.pdf
    • http://files.brennafitzgerald.com/uploads/1/3/0/8/130814676/6523757.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/16935952428.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/rapubami.pdf
    • https://cdn.shopify.com/s/files/1/0437/6834/8830/files/nudimakekome.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/59533209356.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/bazupumo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5030/files/nojiwarumedom.pdf
    • https://cdn.shopify.com/s/files/1/0437/3184/5271/files/grenada_lake_levels.pdf
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/firiwugigusap.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/2102490384.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/gajalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/42635132319.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/laduvigajilamemesuj.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_off0000752d.bin
3a605f9edfd896fb1badfae4789da8f68a38ed18ccfc69a0d63819dca7a9c394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752D 5108 bytes
font_01_sfnt_off000086a8.bin
9aac713eb7938e935090c1a79ca1711e673d13a116834c062cad627bbbc09049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A8 9792 bytes

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