Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcae0ad4e1fe3e92…

MALICIOUS

PDF

36.9 KB Created: 2020-08-21 18:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46c82d07446d92d682adca4185997f9e SHA-1: e0514e2041ce766eaf4ccf60da207090dfa62ec1 SHA-256: bcae0ad4e1fe3e92aed693d9eef10032d6139d71818025cee9cb1fc19e2b2231
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 what appears to be a link farm designed to artificially inflate search engine rankings. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which likely serves as the initial stage for delivering further malicious content. The document body itself contains garbled text but also includes the target URL for the redirector and several other URLs hosted on cdn.shopify.com and other domains, suggesting a broad attempt to distribute 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=2005+bayliner+185+swim+platform
    • http://files.adeservingdandelion.com/uploads/1/3/1/6/131606672/wegogo_vuxipid_xaxaligiju_darisapo.pdf
    • http://files.enhopeexchange.org/uploads/1/3/2/6/132682106/zutex.pdf
    • http://lupezog.southamptonisoc.org/uploads/1/3/0/7/130776208/xunaxaveb.pdf
    • http://tegug.quiltingshanty.com/uploads/1/3/1/4/131437254/7075766.pdf
    • http://pagikiri.goatlifemedia.com/uploads/1/3/1/4/131408229/libitefotokofarozo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3614/files/epidemiologa_de_la_diabetes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/48682195796.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8074/files/patellofemoral_knee_pain_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/rafaxelopojaxivuzilafemem.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/9148768296.pdf
    • https://cdn.shopify.com/s/files/1/0431/0027/4845/files/vogomutikukujugi.pdf
    • https://cdn.shopify.com/s/files/1/0460/1344/8353/files/distributive_property_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8912/files/sosasul.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/fezibiwapigozufog.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_off00004cd4.bin
1ee6a49f6dbe18ac2221ac88fd936abbb0e8ca8f125426b6c3fcbce7309e484e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD4 5932 bytes
font_01_sfnt_off000060f8.bin
c6dce7b059ee161efc8f082502100be641ac12989aba1dbd7403890ba8e16790		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F8 10636 bytes

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