Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00c444d94ad12b3…

MALICIOUS

PDF

32.6 KB Created: 2020-08-12 06:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f1f1a4d4ac161b84ea193d0efa3ab27 SHA-1: 2b92528bd003bcc554df0f916b7236729d133e2e SHA-256: b00c444d94ad12b38b2c2e0c3b9cba445d685d15ecfb13cf48a0f0248a7e9aad
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 numerous embedded links. One critical heuristic indicates these links point to a known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=ahindra+ghosh+pdf'. Another heuristic flagged it as a PDF link farm, with many links hosted on cdn.shopify.com, likely to disguise the true malicious destination. The document body contains garbled text and embedded URLs, reinforcing the malicious link redirection pattern.

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=ahindra+ghosh+pdf
    • http://files.regencyflats.com/uploads/1/3/1/4/131482941/berixawo.pdf
    • http://files.videopeople360.com/uploads/1/3/1/6/131637302/4268638.pdf
    • http://files.gourmetpieguy.com/uploads/1/3/1/4/131407235/8689015.pdf
    • http://files.thejagwrangler.com/uploads/1/3/2/7/132741476/051d8b4815b.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/25853700178.pdf
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/fawagifubixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/ruselipolawenomikimuxel.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/pibederavoxunufezologop.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2054/files/access-_control-_allow-_origin_htaccess.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/orbital_gateway_login.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/13265601650.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0028/files/beginners_guide_to_solidworks_2020_level_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/51539864170.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6685/files/basic_capitalization_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/fazukare.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7913659608.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_off00004783.bin
38b541cf082b7d88422a7e0eda36bdb2fd374797ab58e3af196c4f2019aef797
pdf-font-stream PDF embedded font (sfnt) at offset 0x4783 5260 bytes
font_01_sfnt_off00005957.bin
d4db19c46537520de3a1b511a67a872b13d3f1c76c12cd650948df4850e7924d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5957 8376 bytes