Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d5cbeba567f175…

MALICIOUS

PDF

46.4 KB Created: 2020-07-25 21:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 748b701a30ec2aa6068bba8bca0b0070 SHA-1: d82f19ef3f347ec1c23bc185ecc2b6e4ec4d142b SHA-256: e4d5cbeba567f175e42bc552a238cb73e5f62cd332e2e10d1abc254a534524c9
120 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 external PDF files hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=heterogeneous+catalysis+nptel+pdf, is identified as a malicious redirector. This suggests a link farm or SEO poisoning attack designed to direct users to 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.cc/pify?keyword=heterogeneous+catalysis+nptel+pdf
    • http://files.glitznglamedinburgh.co.uk/uploads/1/3/0/7/130776823/gomebotokon_wunovitunitob.pdf
    • http://files.docksideengraving.com/uploads/1/3/1/3/131380440/6611840.pdf
    • http://files.mndeathcollaborative.com/uploads/1/3/1/8/131856706/3492921.pdf
    • http://files.stninascoffee.com/uploads/1/3/1/4/131438437/joripelig.pdf
    • http://files.legacyhorselogging.com/uploads/1/3/1/6/131636990/rakofidi-tuxujojaxeki.pdf
    • http://files.mndeathcollaborative.com/uploads/1/3/1/
    • https://cdn.shopify.com/s/files/1/0432/9930/7678/files/zusodosiferisowijiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/muwalumurezuzun.pdf
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/zubobisevesij.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/50854250809.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/56552237248.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/fimasawipaduzafabudule.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/jupiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/zimatadir.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/jowalineriwebotumopuluku.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/morawixidames.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/46055427062.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/rugaxagiwejarovo.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_off000073de.bin
d2b552071f50b84c0597bf8e818ede7fd3b02ff5c93c17f34a21c421aecd6211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DE 5268 bytes
font_01_sfnt_off000085e5.bin
d8aa3417ea43db508c184c165b734ea9c2cf7ba075ff72f41c7623395a9b7d74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E5 11812 bytes

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