Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb8ba146c07bcf2…

MALICIOUS

PDF

69.4 KB Created: 2020-08-27 12:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5095573e16a6e8dd57eb0b5f6852e99b SHA-1: 0ef045ed5e8ee46ceec1b8787ef4715423350c35 SHA-256: ddb8ba146c07bcf2bb38677fa2cdc09c6320ebb1750ca9e60e115d2118db6b8b
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, revealing a large number of external links within the document. The primary malicious URL identified is https://ttraff.ru/pify?keyword=the+format+form+is+not+supported+for, which is likely used to redirect users to further malicious content. The document body is heavily obfuscated and contains embedded URLs, further supporting the malicious nature.

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.ru/pify?keyword=the+format+form+is+not+supported+for
    • http://gagevo.margarettellis.com/uploads/1/3/1/4/131453060/c190bb69f524a3.pdf
    • http://files.laurasarts.com/uploads/1/3/2/6/132681342/nexixelurorul.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4755/files/tetaxuzonukorusesilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/sobipojoko.pdf
    • https://cdn.shopify.com/s/files/1/0430/8061/4041/files/diabetes_pregnancy_guidelines_acog.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/83919537623.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/mesobuthus_eupeus_care_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/81894262002.pdf
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/4591635615.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7414/files/lurokaditiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7476/files/1985812704.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/ditunotewefuzog.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3296/files/bekepas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b55e.bin
4bd843ccae7338a6104b4855dc40fe8aab8a81b3fedaf58b14718f4677eca4d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB55E 5200 bytes
font_01_sfnt_off0000c6e0.bin
d39f00687998a3465e897b8d1975757a88fa191397e2b92f72f22ea435911e2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E0 13412 bytes
font_02_sfnt_off0000f2c7.bin
43f18b73c6b83a7361b0f82441ef3583dcb4cea91362d9c0926e05ad0fdd565d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C7 16284 bytes

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