Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb421e652e1706e…

MALICIOUS

PDF

52.5 KB Created: 2020-08-15 22:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88b1e46e5d522020e534fbbc583de355 SHA-1: 11bd1ae9088939005328d5e38145e02495c53b54 SHA-256: bfb421e652e1706ec2ab0a0ca7df3b109c70004faf3b5d554e5840bdd6841da7
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=approval+sheet+meaning'. It also exhibits characteristics of a PDF link farm, embedding a large number of external links, many of which point to potentially malicious or unknown domains. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, suggesting an attempt to disguise malicious activity as a document sharing or information retrieval process. The primary attack pattern involves luring the user through these embedded links to a malicious site.

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=approval+sheet+meaning
    • http://kegivuwa.drlindagedeon.com/uploads/1/3/1/6/131636744/d554611d00.pdf
    • http://mobov.grandcanyonproject.com/uploads/1/3/0/8/130874655/jakodojad-vevebepimatitot-kafux.pdf
    • http://files.sunrisesolstice.org/uploads/1/3/0/7/130775921/wobizuvujal_ralob.pdf
    • http://files.vtiie.com/uploads/1/3/0/7/130738970/8689585.pdf
    • http://files.msbfitness.co/uploads/1/3/1/3/131381078/nixapi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/scarborough_town_centre_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/jurnal_anemia_terbaru.pdf
    • https://cdn.shopify.com/s/files/1/0435/9664/4511/files/senekonapajameda.pdf
    • https://cdn.shopify.com/s/files/1/0434/8739/6004/files/nanotechnology_slideshare.pdf
    • https://cdn.shopify.com/s/files/1/0447/1917/7882/files/poverty_alleviation_essay.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/24183725084.pdf
    • https://cdn.shopify.com/s/files/1/0434/8382/4294/files/xofigopiwuvamewemiraz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/6283933001.pdf
    • https://cdn.shopify.com/s/files/1/0446/6363/6131/files/wimibotitozurotobotor.pdf
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/kepilazovetupisot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39646295774.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007530.bin
8ce743c3d3af5777169966bc08f7cf693b41626d0afac47a97b18b0d18a93593
pdf-font-stream PDF embedded font (sfnt) at offset 0x7530 5280 bytes
font_01_sfnt_off00008706.bin
54ec4848617558cb231c3786a0f4c57880574fa1aa5325c021e2e43fe5400ba5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8706 10364 bytes
font_02_sfnt_off0000aac0.bin
43d226eab8adb118df9099a1f4e57ffe54b1777be202027c4d7f70d7646a3c9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC0 7956 bytes