Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd23a47e943b1474…

MALICIOUS

PDF

59.7 KB Created: 2020-07-09 01:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa00b3ae6d80852654f9b93847b84ea6 SHA-1: b500e3dfab03021a2341f61faca6c78114afeeaa SHA-256: bd23a47e943b1474b3e147c390b295f0c80aa79e0a063eae4b63289a8924f8b7
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains numerous links to external PDF files, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector. Additionally, the document body, though partially corrupted, suggests a lure related to a 'Dell r840 datasheet pdf', which is likely a pretext to encourage users to click the embedded malicious links. No scripts were extracted from this sample.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/wb?keyword=dell%20r840%20datasheet%20pdf
    • http://files.ornamentsofexpression.com/uploads/1/3/1/4/131455883/vojosa.pdf
    • http://files.sechodb.com/uploads/1/3/0/8/130814754/8200698.pdf
    • http://files.tomshultz.net/uploads/1/3/0/7/130775846/fd92088d0.pdf
    • http://files.isoandbusinessexpert.com/uploads/1/3/0/8/130813797/noxodak.pdf
    • http://files.summerbeez.com/uploads/1/3/0/7/130775138/jososoxukifij-mofalirevijubum.pdf
    • http://files.southcoastwarriors.com/uploads/1/3/1/3/131398093/zuzuj.pdf
    • http://files.midwestjuniorpreviewshow.com/uploads/1/3/0/8/130874307/desuvevatebakogelu.pdf
    • http://files.taylor-poleskey.net/uploads/1/3/1/3/131383269/9010978.pdf
    • https://jokurana.files.wordpress.com/2020/07/46497960386.pdf
    • https://nesolurifan.files.wordpress.com/2020/06/8407978435.pdf
    • https://kedisufod.files.wordpress.com/2020/06/77282134720.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.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_off00009a8b.bin
be906056ba05e85b660b3738118aab57ce696a985c9ff20ea3020fcd9c870825
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8B 3548 bytes
font_01_sfnt_off0000a740.bin
a50a8c3c2c62a88d9cf5ddab6893901620e33f5987b45b1ff8d91fdfb49d1406
pdf-font-stream PDF embedded font (sfnt) at offset 0xA740 5076 bytes
font_02_sfnt_off0000b898.bin
3f8f999300a460e063389b11b5955f72c5d87864360f387dbd4daf7d179a0a4e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB898 12656 bytes