Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4129a2e3e96993…

MALICIOUS

PDF

53.1 KB Created: 2020-08-01 09:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4939e04806f682f376c379b5f1cd7d1c SHA-1: f6f1c116dfa4e038b8ea52f5041412e9ea742b31 SHA-256: 4b4129a2e3e96993a269a0a78977b91d2856e12513fc2cc91bcd06f0fe32102a
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to shopify.com domains, which is indicative of a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=relic+douglas+preston+pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=relic+douglas+preston+pdf
    • http://files.gluggakeyp.com/uploads/1/3/0/7/130739856/jumak-kezisubufi-zukesimepomuxig-vutoxe.pdf
    • http://files.sags.org.uk/uploads/1/3/1/1/131164488/b9d0cec.pdf
    • http://files.atypicaltipple.com/uploads/1/3/0/8/130813859/fakukigux.pdf
    • http://files.compass-quay.com/uploads/1/3/1/3/131383404/dedibotavosowan_vogamez.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/pamezem.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/moxagedevarozek.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9477/files/23060978672.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12319118289.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1003/files/55737812877.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/nedoru.pdf
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/pitovakowep.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/wiforuritano.pdf
    • https://cdn.shopify.com/s/files/1/0434/2343/2854/files/86872905450.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/97146873863.pdf
    • https://cdn.shopify.com/s/files/1/0438/3365/5446/files/lobatexalopovanonitor.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/wugaxukojofubi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0811/files/zagunawasudewusobugakutov.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_off000092bf.bin
299330b113725b45f0aa27261d43ca4b0c4bbb4a19a90704b0a43d7305658754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92BF 5328 bytes
font_01_sfnt_off0000a4f7.bin
deddaea36a4df7416d711e065f1faa79827058a4a8a7c9c30ec619851ae1efeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F7 10116 bytes

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