Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c84b8fd19cc1c2…

MALICIOUS

PDF

69.5 KB Created: 2020-08-12 01:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 083a3e7495b8b6f643467977cf78f6b2 SHA-1: fde3eeda7e323594d7515482fdd4e8870e7fd5a3 SHA-256: 47c84b8fd19cc1c2de29033586ae8e46a210a51729181bb8ac5eea98543775ab
152 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.com'. The document body, though heavily obfuscated, also contains this URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely for obfuscation. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=fisiopatologia+do+cancer+de+prostata+pdf
    • http://files.katewhyte.ca/uploads/1/3/1/3/131380236/sefoxita.pdf
    • http://files.jeniballdesigns.co.uk/uploads/1/3/1/4/131437799/zolafakeb.pdf
    • http://files.elevatedaccounting.com/uploads/1/3/1/4/131408170/dawudamodajumij.pdf
    • http://xurikaruz.notanothersupermum.com/uploads/1/3/2/3/132303382/robolatedizu-bigipajizud-bawubijibirapon-fufosonovorop.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/importance_of_learning_by_doing.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1266/files/behavioural_activation_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/gepifonoxikogoxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2874/2298/files/wumutamapobanam.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/68199466099.pdf
    • https://cdn.shopify.com/s/files/1/0450/6599/4392/files/complete_core_java_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/32951482743.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/algorithms_and_data_structures_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/30078875178.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/rekagirawukelasusibidon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.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_off0000d2eb.bin
7a415f91080ae0ec018844bcfd94c0395ff8448c25d4c29aebc7c4f39dc5eba9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EB 5276 bytes
font_01_sfnt_off0000e4ea.bin
2bfd30d00a428d6f4174741246b672b62f47dcb2022f968aed01fb6389844392
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EA 10452 bytes