Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c9a93fd49d374e…

MALICIOUS

PDF

47.1 KB Created: 2020-07-31 03:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a20f83a7f0bf4307ef9fdb5455f3841e SHA-1: 13b1c3cb64b70a25423d46699bd4deb02aa46028 SHA-256: d4c9a93fd49d374e560298cae9fed859ffb41ac7b2b615730f583fae4cd9932f
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as 'Bajaj Allianz life insurance pdf'. This link, ttraff.cc, is known to lead to malicious infrastructure. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=bajaj+allianz+life+insurance+pdf
    • http://files.limerickyogaroom.com/uploads/1/3/2/6/132682852/kupeveg.pdf
    • http://files.stemsuccesseducators.com/uploads/1/3/1/4/131483097/7752384.pdf
    • http://files.marinanatalijewelry.com/uploads/1/3/0/7/130776208/ganapamime-magorijukibivir.pdf
    • http://files.fergusonrv.com/uploads/1/3/1/4/131408581/0357c.pdf
    • http://files.jwcyclerepaircentre.com/uploads/1/3/0/7/130776308/4072623.pdf
    • http://files.jwcyclerepaircentre.com/uploads/1/3/0/7/130776308/4
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99594865370.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/xexedorawapalumopadavogog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikas.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/tovabomef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/571475918.pdf
    • https://cdn.shopify.com/s/files/1/0429/4282/4611/files/87485929956.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/93594949255.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/84099655659.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_off000079d1.bin
ce21a334883cd15e6a6e4e3760fe2b8a23ffb3c72641781f42e0cab9c5206797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D1 5016 bytes
font_01_sfnt_off00008aed.bin
9d36fa25c4e268f090dbacfde13633538b782575c6d00b8f43179c6b21ec8f62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AED 10756 bytes

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