Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c18ef09043eb98…

MALICIOUS

PDF

66.4 KB Created: 2020-08-21 16:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e2fd85b374923997cc21ef74eb11133 SHA-1: 428fc2df79b981320e48cbf7d79bf255fe4d33f5 SHA-256: b4c18ef09043eb98f864bd2f66193a0d7b6ef17ea134bce8a6faaf330cc0c176
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'barangay id format'. This suggests a phishing attempt to redirect users to malicious content. The presence of numerous external PDF links also points to a link farm strategy, likely for SEO poisoning or distributing malicious content.

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=barangay+id+format
    • http://nedogapex.trainingmadefair.com/uploads/1/3/0/7/130775388/vipubefutum.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/17337421373.pdf
    • https://cdn.shopify.com/s/files/1/0437/0530/3190/files/kewudamujopedofezituxuwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/fejirizojerilake.pdf
    • https://cdn.shopify.com/s/files/1/0447/1989/8777/files/luvovegofumemilobug.pdf
    • https://cdn.shopify.com/s/files/1/0435/5801/1035/files/dikutoma.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0728/files/cahier_des_charges_creation_site_internet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1891/9837/files/17343114558.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/roller_burnishing.pdf
    • https://cdn.shopify.com/s/files/1/0458/3289/6675/files/deschutes_river_fishing_report_odfw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6902/2109/files/vejomuvifefi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/4032527329.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_off0000c6ed.bin
459d687bfc0393a4d866bd303dc07bbefbeb302ba9249626573f74238d1f26ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6ED 5168 bytes
font_01_sfnt_off0000d86b.bin
aac953113287a4efbc1bd46c0565ba7784efa89d8f6df9ee4a3e55c2c74edab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD86B 10920 bytes

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