Malicious PDF — malware analysis report

Static analysis result for SHA-256 6130d48d9f892683…

MALICIOUS

PDF

57.2 KB Created: 2020-08-20 08:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81d05e36fee5ffdeca40f823ecf72eee SHA-1: 2f30150983291171591faad7ec548ecdc40a1e1d SHA-256: 6130d48d9f89268398e5cd875f75e8b485f651adf2ea41271b9078336049036f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits a PDF link farm heuristic, containing numerous links to other PDFs hosted on Shopify and other domains. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The primary attack pattern involves directing users to malicious sites through embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=blown+away+1993+parents+guide
    • http://files.audaciouslifestyle.com/uploads/1/3/0/7/130738621/xusamagowes-suvixap-sabumisisinezo-zogabuvapafu.pdf
    • http://jimoj.nerdnotesguides.com/uploads/1/3/1/1/131163635/6178712.pdf
    • http://files.treeservicejacksonmi.com/uploads/1/3/1/8/131856188/tiwidimosatij.pdf
    • http://files.eklavyadun.org/uploads/1/3/1/3/131398117/3520499.pdf
    • http://files.danpardo.com/uploads/1/3/1/1/131164386/5957313.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0906/4607/files/comunicao_no_ambiente_de_trabalho.pdf
    • https://cdn.shopify.com/s/files/1/0435/3720/3364/files/24472587479.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/brazoria_county_tx_police_reports.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/imagina_spanish_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3970/files/75681417168.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/desosomojakiridipusina.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/22257458678.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/4919474359.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097c9.bin
a29b6c19b697f5c5fcaef5756b88005166b71af2a2c7c12015f837d1725284aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x97C9 5744 bytes
font_01_sfnt_off0000ab7f.bin
d09014ee5ec193cb90e7fbb28b193dd20d13aaca442bb301e03692112122f144
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB7F 14164 bytes