Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4256c518b0927d9…

MALICIOUS

PDF

42.0 KB Created: 2020-08-15 13:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdf5ab9ad70668348ea22cad974980be SHA-1: da3e20a2f90cf7dd276740189298b0f281873083 SHA-256: c4256c518b0927d99c69c0491c0a6dfd8d0e9153af3d884e70e950c5d68c76de
150 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 of which point to a link farm hosted on cdn.shopify.com, designed to appear as free PDF books. One of the primary links redirects to `https://ttraff.com/wb?keyword=free%20pdf%20books%20on%20prayer%20and%20fasting`, which is flagged as a malicious redirector. This indicates a social engineering tactic to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=free%20pdf%20books%20on%20prayer%20and%20fasting
    • http://sanazaza.anglicanchurchholyspirit.com/uploads/1/3/1/3/131398140/d283c29.pdf
    • http://files.remodistawomen2watch.com/uploads/1/3/2/6/132681293/6877473.pdf
    • http://files.norwaynemusic.com/uploads/1/3/1/4/131437276/8d12e.pdf
    • http://files.martinchilando.com/uploads/1/3/0/7/130776592/a75919efbffb6c.pdf
    • http://vupobuke.misfotografie.de/uploads/1/3/0/7/130738696/morugadifoketadeju.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/rijilejek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rapuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/gokeruzuworokonek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64541570927.pdf
    • https://cdn.shopify.com/s/files/1/0453/9475/5752/files/mandala_art_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32823332632.pdf
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/57630185492.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/gokuzavi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/66796114082.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/donevat.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/77541647550.pdf
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/divugavuwotipul.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_off000064ef.bin
92b10b3408368a345916dc2547a63e87777c4dc734792b604f7b3fa30510502a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EF 5440 bytes
font_01_sfnt_off00007786.bin
9097d016b9d020e2ce051d1863023b5c7924fd7cfc118f0d6304d80a287bc511		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7786 10376 bytes

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