Malicious PDF — malware analysis report

Static analysis result for SHA-256 444e6fd69485a5ca…

MALICIOUS

PDF

45.7 KB Created: 2020-08-16 00:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40c5157d90bae63d3cc6f48f8a46755d SHA-1: 72d10ef9434268dacb45a8f0a3444e0be758a3de SHA-256: 444e6fd69485a5cacfa5645b5504b81af9740823a0fef680ca93e205d90ff3df
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains text related to 'fine woodworking' and the malicious URL, suggesting a lure to trick users into clicking the malicious links. No scripts were extracted from this sample.

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.ru/wb?keyword=fine%20woodworking%20best%20workbenches%20pdf
    • http://files.tonyastuartmelland.com/uploads/1/3/1/3/131380471/jufimuzega_dozoti.pdf
    • http://files.bodyworkharmonics.com/uploads/1/3/1/4/131409755/5038472.pdf
    • http://files.gibtech.net/uploads/1/3/1/8/131858916/af057af239b875a.pdf
    • http://files.ellismedlibrary.org/uploads/1/3/1/4/131407802/9822353.pdf
    • http://ferope.bwvalencia.com/uploads/1/3/1/3/131380158/bolusipus.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5165/files/tobepibaleginikumuvikili.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/4461203186.pdf
    • https://cdn.shopify.com/s/files/1/0431/1348/0343/files/18212482689.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/73590337362.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/26887112573.pdf
    • https://cdn.shopify.com/s/files/1/0432/3750/7240/files/lowugixidafapuzewafix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/tofilupigirurikevizaxanim.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/taxemepomoreb.pdf
    • https://cdn.shopify.com/s/files/1/0435/5276/8151/files/vesaz.pdf
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/dugapabawisokawulid.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_off00007472.bin
dd8e1b8c5aa48ea5bb1e93fd34a12d91a8b0a7241b43fab70b2a2977f468c73c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7472 5424 bytes
font_01_sfnt_off000086f9.bin
ded963d02d7dd52168878625fbbe6482e34ca6c5a4afa8889961552fac091f58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F9 10276 bytes

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