Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb91aa6589852f1…

MALICIOUS

PDF

57.3 KB Created: 2020-08-06 17:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a388964cb5bce26423e96436898bd5a SHA-1: 1582e0b6d0dca8683f655faa4f5525cb76c863e5 SHA-256: bbb91aa6589852f15fe8dacea97d104c197c360f4d795795234b3d86678cbbf8
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning technique used to lure victims. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect the user. No scripts were extracted, and the primary malicious activity observed is the redirection via embedded links.

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/wb?keyword=hind%20swaraj%20m%20k%20gandhi%20pdf
    • http://files.southerncare.co.uk/uploads/1/3/1/3/131379792/3683773.pdf
    • http://files.steffenblings.com/uploads/1/3/2/8/132815791/9538074.pdf
    • http://files.gjsparklemepretty.com/uploads/1/3/0/7/130775441/7407810.pdf
    • http://files.youcannotunsee.com/uploads/1/3/0/7/130775979/zifop.pdf
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/70143564859.pdf
    • https://cdn.shopify.com/s/files/1/0434/1789/5070/files/35956274567.pdf
    • https://cdn.shopify.com/s/files/1/0439/4775/3640/files/96912216023.pdf
    • https://cdn.shopify.com/s/files/1/0433/9177/8965/files/35703055579.pdf
    • https://cdn.shopify.com/s/files/1/0429/7087/4009/files/placing_reinforcing_bars_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/87590710052.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90554838216.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/kabopenudutetuguwem.pdf
    • https://cdn.shopify.com/s/files/1/0440/5837/8392/files/bixowejebobuwezekarawom.pdf
    • https://cdn.shopify.com/s/files/1/0430/4764/9429/files/manokoluxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/texafetelotaxejagukexosus.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_off0000a1e9.bin
d043a3b5644214e50459b40e1ec2fc0741684aedc27a48a054d21a4964381991		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E9 5616 bytes
font_01_sfnt_off0000b4f5.bin
817e70711f12886ea48e336d2d845c8e056ab78c8b43eedf9cd0dc1d1bb62613		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F5 10484 bytes

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