Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1714165d3e21c0…

MALICIOUS

PDF

51.1 KB Created: 2020-08-10 23:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cce8f38bc0361e8974a793ac23e8b0b4 SHA-1: 4c607c7a3fead9eb5ec1dc0b6121bca71a473d8e SHA-256: 6e1714165d3e21c0dbb0322062451d1336114c4dc8ed5ab1ec31fbe15f754c7e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains text related to a 'nursing care plan' and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm used to obscure the ultimate destination and potentially for SEO poisoning.

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=nursing+care+plan+of+cva+cerebrovascular+accident+filetype+pdf
    • http://files.kissandtails.com/uploads/1/3/1/6/131606248/8cd1d4308844.pdf
    • http://files.jennysparrowworks.com/uploads/1/3/1/4/131406435/533ebe74907f5.pdf
    • http://files.dawndiezwillis.com/uploads/1/3/2/6/132695862/tazuda_wetonibojiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/54886019731.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/latorukutobonezovunogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/ielts_listening_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/unidentifiable_ore_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/sarajamu.pdf
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/ef_a_tale_of_memories.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/54867915390.pdf
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/sofimifivivibobiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/filopogosiwafukuti.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2606/files/74936833072.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/18934146660.pdf
    • https://cdn.shopify.com/s/files/1/0428/6601/6412/files/kofumimitububajidaka.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/atrocity_act_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/mamorumevobafove.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007990.bin
737a54b7655aabdc4926ec12f9782ac8bd9cc6d292fc7e24af1c7c65ea53c685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7990 5596 bytes
font_01_sfnt_off00008cb2.bin
8faa621cf5be3c67b52cc98b8948623950f479903a36e0616adead6c0258003a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB2 16120 bytes

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