Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd9cad87459d668…

MALICIOUS

PDF

40.8 KB Created: 2020-08-18 19:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 957cbe119aad14b74f9d132b81ef26b2 SHA-1: f8cb50e11ed659018c49dcabe210165559c5c1ef SHA-256: cdd9cad87459d6688416ad21be6eeed47045ecc048ac07dba8796247b60c43d1
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 Shopify domains hosting PDF files, likely as part of an SEO link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=24+slides+ppt+templates'. The document body, though heavily obfuscated, contains this same URL and references "24 slides ppt templates", suggesting a lure to entice users to click the malicious link. The file's purpose appears to be redirecting users to malicious infrastructure.

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=24+slides+ppt+templates
    • http://files.volnapc.com/uploads/1/3/0/9/130968921/5bf60a.pdf
    • http://files.marielarraineweir.com/uploads/1/3/0/7/130740589/7826235.pdf
    • https://cdn.shopify.com/s/files/1/0432/6529/4491/files/public_financial_management_act.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2276/files/vezimuwadunev.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/nupeginagupememopefojukil.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/22445729676.pdf
    • https://cdn.shopify.com/s/files/1/0437/8053/8526/files/free_editor_form_filler.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/piriformis_syndrome_muscle_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/xutobirozewuxuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/3202/6008/files/ada_diabetes_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/zavowazixejogan.pdf
    • https://cdn.shopify.com/s/files/1/0428/7198/0198/files/fufezolaremuwikizitavekak.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_off000062d8.bin
5b8d6385078c0fe7120c481cc940a0e6fe6c7516e44bd0fd43d51208f6cadeaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D8 5132 bytes
font_01_sfnt_off0000743d.bin
e4c2e035ced5cbf8f0f98e9f093396828f30a47cdea256db3f3f99c51d0fda44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743D 10120 bytes

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