Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0760a6e953df9d…

MALICIOUS

PDF

48.0 KB Created: 2020-07-29 05:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 041285155be4ab22c8a205dd4b08a004 SHA-1: ab6d4278392ee85f52c8c5419a465871d5e65ba2 SHA-256: 4b0760a6e953df9da28f3c324ef5a5f5cc60a75a258a0ed1999bd9e09be95c3c
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used in SEO poisoning attacks to drive traffic to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain metadata related to 'Downton Abbey' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. No scripts were extracted from this sample.

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.ru/pify?keyword=downton+abbey+episode+guide+season+4
    • http://files.woodlingsart.com/uploads/1/3/1/4/131412858/4462499.pdf
    • http://files.deefitzsimmonsphotography.com/uploads/1/3/1/0/131070469/garobap.pdf
    • http://files.auscamfreedomproject.org/uploads/1/3/1/3/131381109/e37e462224158.pdf
    • http://files.thepowerhouseuk.com/uploads/1/3/2/6/132695862/5660009.pdf
    • https://cdn.shopify.com/s/files/1/0434/5253/0845/files/pozunulobogaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/1140898961.pdf
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/28528714670.pdf
    • https://cdn.shopify.com/s/files/1/0428/9767/0303/files/zuzifa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/fenifazegimebojemoxesar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0432/2433/4498/files/topijatufidewodalagexajab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82191842179.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60527157158.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/34842297430.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3218030698.pdf
    • https://cdn.shopify.com/s/files/1/0434/8038/3653/files/40290447385.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_off00007c60.bin
bb6cfd35bb1262d5e8c0ca8f8c978f0a86b71718c6b96146cbdcfc1462ee0b67
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C60 5304 bytes
font_01_sfnt_off00008e95.bin
2d2dd665522c2b8580ce216dabac1aa0ffa860fc1e25890d24e6e3949f231399
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E95 10388 bytes