Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d2c3b5e0408f4a…

MALICIOUS

PDF

41.4 KB Created: 2020-08-10 10:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b13198c749d237b10c368e77b6ec4d63 SHA-1: cb13c3af406f0c275ce7ab60e29f97ecf584df01 SHA-256: 99d2c3b5e0408f4a62d5346ec58420483f1388cc616d0ee5851d4b2f1d13f213
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.com', suggesting a phishing or scam attempt. The document body, though malformed, includes the text 'Audited balance sheet pdf', likely a lure to entice users to click the malicious links. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination and potentially 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=audited+balance+sheet+pdf
    • http://files.kellymansfieldart.com/uploads/1/3/1/3/131382721/zolanele.pdf
    • http://files.dawntilduskfarm.com/uploads/1/3/1/4/131437493/7462565.pdf
    • http://kilufep.mrgarcia.org/uploads/1/3/0/8/130814328/8964810.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/jokogojifijabusometabox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/79183481914.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/96978973616.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7911/files/jobaviduwegowiper.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/school_counselor_monthly_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/39139443686.pdf
    • https://cdn.shopify.com/s/files/1/0451/3444/6746/files/anticorpos_monoclonais_e_policlonais.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/wuxon.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/24934714287.pdf
    • https://cdn.shopify.com/s/files/1/0428/4583/1324/files/punimililoriwex.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_off000063ec.bin
94c802ce8c157867b215d3c460391454409b6423c6d462afcb3c94a7d1b5a6e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EC 5276 bytes
font_01_sfnt_off000075dc.bin
47ccc81ed388fc6d168a8208d0210a0e7bd2ebf784b89df9890770e4730f620e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DC 10424 bytes

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