Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6db649686e81af…

MALICIOUS

PDF

49.8 KB Created: 2020-08-20 20:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30ed1dde7d4e8c2bc784a01220304ac2 SHA-1: 85280258ec603d8c7f60f4c7de3fefde7601db81 SHA-256: 2e6db649686e81af6eb8a603fa9825b4bbe7e424145d1ee4a3b3eb7564032740
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The primary malicious URL identified is https://ttraff.com/pify?keyword=pdf+capitalismo+y+esquizofrenia, which is likely used to redirect users to a malicious site. The document body contains garbled text but includes the malicious URL.

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=pdf+capitalismo+y+esquizofrenia
    • http://files.funkychunks.com.au/uploads/1/3/1/0/131071256/kufodozonofunefik.pdf
    • http://dirobate.teahubveg.com/uploads/1/3/0/7/130775047/4931730.pdf
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/82234159648.pdf
    • https://cdn.shopify.com/s/files/1/0439/4100/3432/files/cambridge_english_for_engineering_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0440/5084/1750/files/9060221930.pdf
    • https://cdn.shopify.com/s/files/1/0435/8412/7135/files/20213756731.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/latin_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/91090144360.pdf
    • https://cdn.shopify.com/s/files/1/0432/8813/3787/files/john_deere_240_lawn_tractor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/dawipimoxemuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8656/7841/files/kosudipetanamedi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/28867254823.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/955589589.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060e8.bin
bf89d2b999174b2248415c6b2d27235356ab9fa8ec7621cf38c052614fe4a791		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E8 5460 bytes
font_01_sfnt_off00007369.bin
0372ea136506b883219b1dc613a2902c4db889762984427374301e25a7f23b7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7369 10460 bytes
font_02_sfnt_off00009729.bin
afef7078cb2df19c3af6e0a290a1e91943695396d6c8eacc2b40ed28c0b27951		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9729 16120 bytes
font_03_sfnt_off0000ac14.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC14 4324 bytes

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