Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35a59185c618d55…

MALICIOUS

PDF

41.2 KB Created: 2020-08-08 01:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03c2151c66c1c39889e95b1c43acd0a7 SHA-1: 6c935f3f3b4d6c0d64d74c1a1c6e6623cd26b459 SHA-256: c35a59185c618d551c049f7052137447a010fe63c9ac6d9c2df4e49af31b8551
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the target URL and references to 'Bosch steam boiler pdf', suggesting a lure. No scripts were extracted from this sample.

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.ru/pify?keyword=bosch+steam+boiler+pdf
    • http://files.karibbeankinks.shop/uploads/1/3/2/6/132682232/pidag_piwomo_sapirovuvux.pdf
    • http://files.tessonwueme.com/uploads/1/3/0/8/130874162/28421f895ef0eb1.pdf
    • http://files.conservationtales.com/uploads/1/3/2/3/132302894/2570164.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/dadulivizosag.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8765/files/13547256117.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/osrs_crafting_profit.pdf
    • https://cdn.shopify.com/s/files/1/0437/7047/8746/files/centrelink_rent_certificate_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/fepafipifesa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/6953717372.pdf
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/peremubuxagiler.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2403/files/38553812905.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/67961840912.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/povesuronafelokip.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5832/files/dreamweaver_cs6_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/87128304813.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_off000061c0.bin
bbb0fc488998da716631a7f92bd25a1a3dae3acdbb608042591466436c69e603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C0 5584 bytes
font_01_sfnt_off0000748f.bin
0e156f3819722dbeefa34d5cbb3eb515a3cafc4c3e5d23c3ca685a50fb5e28f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748F 10380 bytes

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